DW Monsters: Drashigs

The next two stories, moving us from season 9 into season 10 are:

• The Time Monster – while the monster of the title is described as belonging to a race of beings (the Chronovores) we don’t see any others, so it’s hard to know what their generic abilities might be, and I will therefore leave them out. I will also leave the Minotaur until later.

• The Three Doctors – while there are antimatter blobs in this story, they’re more a peril than a ‘monster’, and the real foe is Omega, so this is another one I will skip.

Next up is Carnival of Monsters. Despite the title, most of the monsters are only seen briefly over the viewing screen. The only exceptions, and the only ones that are original to the story, are the drashigs. This is their only significant appearance on screen so far, but they have proved popular enough in the ‘deadly alien animals’ niche to appear in two of the spin-off novels and two of the audios – in each case, making one appearance inside a miniscope, and one out in the wild. 

The audio Planet of the Drashigs makes the most use of them, as a sort of Jurassic Park homage that introduces two new subtypes of the creatures. But I will stick with the version seen on screen.

DW Monsters: Solonians

Following on from The Sea Devils, the next story we come to is The Mutants. The eponymous monsters here turn out not to be “mutants” at all but are instead a natural form of an alien race native to the planet Solos. While they have since received the odd passing reference here and there, they currently remain a one-off race, never appearing again in any of the novels, audios, or even (so far as I can tell) shorter works such as comics.

D&D Monsters: Oozes

We reach the final post in this series with the monsters that are, anatomically speaking, the simplest of them all. The idea of monstrous slime is essentially a modern one; some antecedents may exist here and there, but generally, we're thinking of the likes of the 1958 film The Blob or Clark Ashton Smith's formless spawn of Tsathoggua, which made their debut in 1931. 

The 1E Monster Manual includes a number of creatures that could loosely be described as oozes but only four of these have consistently appeared in the core rulebooks (excluding 4E, as I usually do, which retains just two of them in the MM1). Three of these are entirely amorphous, although the one that's perhaps the most notorious does at least have a shape.

DW Monsters: Sea Devils

Next up in season 9, we’re back to present-day Earth and The Sea Devils. The eponymous race are introduced as a variant form of the Silurians adapted to underwater life and, beyond the aquatic theme, provide a similar role in the TV show – although they do appear to be more inherently violent, presumably due to a warrior upbringing. They return much later in the classic run alongside the Silurians in Warriors of the Deep but were not seen again on screen until almost the end of the Thirteenth Doctor’s run. 

Outside of the TV series, they have proved less popular than their Silurian kin, appearing alongside the latter in the 1993 novel Blood Heat, but rarely featuring on their own outside of a few comics and short stories. They have appeared in just a couple of the audios, neither of which feature the Doctor and one of which is part of a larger Silurian plot arc. A mention in a novel that doesn’t feature them directly implies that they are the same as the Deep Ones created by H.P. Lovecraft - although beyond living underwater and being cold-blooded, there doesn’t seem to be much resemblance between the two.

D&D Monsters: Noncorporeal Undead

The concept of ghosts or other restless spirits is an ancient one, found, in some form or another in pretty much every human culture. The details vary considerably, and ghosts may not necessarily be malevolent, or even frightening but the basic idea is essentially universal. They're the sort of thing that just had to be included in D&D, albeit with the addition of generally making them more dangerous - and thus a meaningful threat - than they usually are in legend. There are several different types in the game, arguably a different sort of being from the corporeal undead, united by lacking a physical body and with various other means of inflicting harm. Four of these types are consistently present in the core rulebooks, although their details can vary significantly.

D&D Monsters: Succubi

The word "succubus" comes from Latin, referring to a type of demon that seduces men and slowly saps them of their vitality over a series of sexual encounters. This basic concept, however, long precedes even the Romans, with the general idea of  'evil demonic seductress' being fairly common across many cultures. It may, in part, be connected with the same sort of hypnogogic phenomenon that is responsible for the night hag myth - albeit interpreted in a more pleasurable manner. Indeed, succubi were not originally regarded as being attractive in their natural form - although, as with the D&D creature, they could shape-shift - the 'sexy' form only starting to become the standard in modern times.

DW Monsters: Peladon

The next story that we come to is The Curse of Peladon, which features no fewer than four different kinds of alien. Chief among them are the Ice Warriors, which I have already covered. Of the three new introductions, Arcturus’ abilities are more a product of the device he is using to move around, which must be customisable, so I’ll leave him out. That leaves Alpha Centauri and Aggedor.

Both reappear a couple of seasons later in The Monster of Peladon, and Alpha Centauri also has a cameo appearance (voiced by the same actress, no less) in the Twelfth Doctor story Empress of Mars. To date, Alpha Centauri has also appeared in five audios and one original novel, all set on Peladon, and the race has been referenced in a number of other novels. Aggedor is slightly less popular, appearing in two novels and one audio – although in their case, it’s different members of the same species rather than the same individual.

D&D Monsters: Mimics

The 1E Monster Manual includes several monsters that are essentially animate traps of one kind or another - floors that try to eat you, ceilings that try to eat you, stalactites that try to eat you, and so on. All of them with bland descriptive names rather than even an attempt at something atmospheric. The only one of these to remain consistently in the core rulebooks, however, is the mimic. Which is essentially a treasure chest that tries to eat you. It's certainly a contender for "silliest monster in D&D" (although it has some pretty stiff opposition) and it should come as no surprise that it's original to the game. Indeed, it's tailor-made for the "dungeon crawl" genre that D&D basically invented, since it makes even less sense in any other context than it does in that one.

So... yup, time for the mimic.

D&D Monsters: Shambling Mounds

The most obvious inspiration for the shambling mound is the DC horror character Swamp Thing, a plant-based monster popular enough to appear in a rather naff '80s film and a far superior '20s television mini-series. Swamp Thing first appeared in 1971, well before the shambling mound's debut in 0E, so the timing works, although that doesn't necessarily mean it isn't a coincidence. Notably, for instance, the shambling mound is literally a mass of vegetation, which is a fair description of Swamp Thing... but only following the characters' reinvention by Alan Moore, five years after the Monster Manual. Since there isn't much further resemblance between the two, it seems likely that the shambling mound is an original creation, with no apparent antecedents in myth or legend.

DW Monsters: Ogrons

The remaining two stories of season 8 are:

•          The Colony in Space – apart from their leader, the aliens here do not seem very different from humans in their basic biology, although they do have specific skill sets
•          The Daemons – so far as we can tell, most, perhaps all, of the Daemons’ special abilities come from their near-magical technology, so I will pass on them

This brings us to season 9 and Day of the Daleks which, apart from including the obvious (albeit only briefly), introduces the Ogrons. These appear in two more stories during the Third Doctor’s era but have not been seen since then in the TV series. They have, however, often been mentioned or made brief appearances in other media, with significant roles in at least five novels and six audio plays to date. They mostly appear as mercenaries, but the audio Planet of the Ogrons does give us a brief look at their homeworld and native culture adding a little to what we already see in Frontier in Space.

Description and Biology

The Ogrons are tall and heavily muscled humanoid aliens with ape-like faces.  Given that they are alien, we don’t know how distinct they may be from humans biologically, although the implication would be “not by much”, at least to anyone that isn’t, say, trying to perform abdominal surgery on one. At least on TV, we haven’t seen any females of the species, so technically we don’t know that they’re mammalian, although they certainly seem to be and the likelihood is that here, too, they are little different from humans.

D&D Monsters: Treants

Although the idea of magical and possibly animate trees does exist in mythology and folklore, the idea of a race of such beings, in the form of ents, seems to be original to Tolkein. He took the name from a variant form of  "ettin", the original English word for what we now call a "giant", and not from any pre-existing tree-person. (Other giants exist in Tolkien's world, but they are very much bit players unlike, say, the giants of Narnia). D&D 0E included ents in its original rulebook, but legal problems led to them being renamed as "treants" from 1E onwards. For similar copyright reasons, it's this newer name that has stuck in fantasy games in general, even though, really, there isn't much difference between the D&D version and their entish inspiration.

D&D Monsters: Xorns

Xorns are an original creation of D&D, with no particularly obvious antecedents. The name was almost certainly chosen so that the 1E Monster Manual had at least one monster for every letter of the alphabet... the same is probably true of the quasit. Which, other than that it's a monster largely built around defence rather than offence, is about all one can say about the general concept.

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1E

The original xorn has a barrel-shaped body covered with scales that basically take the form of roof slates, and are likely made of a similar, if less fragile, material. It is notable for its (mostly) triradial symmetry, something that makes it look particularly alien. It has three legs, which seem to lack knees and are similarly covered in the armoured stone scales - if anything, it's a wonder it doesn't move even more slowly than it does. The arms look to be less heavily armoured, and are clearly more flexible; they're positioned above the spaces between the legs rather than directly above the hips. 

DW Monsters: Axos

Moving on to season 8:

·       Terror of the Autons features one of the key races I covered at the start

·       The Mind of Evil features an alien psychic parasite that’s really more of an effect than a monster

And that brings us to The Claws of Axos. Technically, Axos is a single individual, which could be left out on the same grounds that I’m not attempting to stat up (say) the Master. But it functions as an alien race and it’s at least possible that there are more of its kind out in space somewhere.

Aside from a couple of short stories and comics, Axos only makes a return appearance in a single audio-play, The Feast of Axos, featuring the Sixth Doctor.

D&D Monsters: Salamanders

Salamanders are, of course, real creatures - long-tailed amphibians with a vaguely lizard-like appearance. The Ancient Greeks and Romans attributed a number of magical abilities to them, some of them related to fire, but it's clear that they were describing the real animal when they did so. In the Middle Ages, however, there's more of a split between the amphibian and the fantastic creature, with the latter taking on more exotic forms and powers. This culminates in the 16th century with Paracelsus adopting the name for what he termed "fire elementals" and it's this that's most likely the inspiration for the D&D monster.

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1E

The salamander in 1E is roughly humanoid from the waist up, with the legs replaced by a single tail that keeps the creature in broadly human proportions. A series of narrow frills extends along the back, and also down each of the arms; these are partially erect, but whether they are buoyed aloft by hot air or are self-animated tendrils isn't something we can determine from the picture. The head has a flattened cranium and a triangular jaw with sharp carnivorous teeth. The ears are significantly elongated, with further frills on them and a pair of branching tendrils project out from either side of the nose, which we might suppose to be sensory. The creature has a partly striped and partly mottled pattern, with the background colouration shading from yellow to red along the length of the body.

D&D Monsters: Efreet

Ifrit are a type of demon in Islamic folklore, associated with the jinn, and in some cases having similar powers (such as the ability to grant wishes), although their exact relationship is nebulous. They are associated with the underworld, fire, and smoke, and are generally hostile. This explains many of the attributes of efreet in D&D, which are specifically described as the fiery counterpart to djinn. (The idea that therefore must be watery and earthen versions of the same thing does not appear in the original Monster Manual, although it was introduced later during the 1E era, with the name "marid" being borrowed from another kind of Islamic demon, and "dao" seemingly being original to the game).

DW Monsters: Primords

While the story Inferno is best remembered for the alternate-history sections, it does also include monsters. Never named on-screen, they are referred to as "Primords" in the credits and are bestial transformed humans, rather than aliens. Beyond their one appearance on TV, their only significant story to feature them is the Third Doctor audio play Primord which is a sort of sequel to Inferno and shows a few exceptional individuals in addition to the regular sort I will be concentrating on here.

Description and Biology

Primords are created when a human comes into skin contact with Stahlman’s Ooze, a viscous green fluid extracted from deep beneath the Earth. (Some of the tie-in novels have tried to explain how it got there, but it’s not relevant for our purposes and isn’t mentioned in either of the two main stories to actually feature the race). The transformation can take a few hours, during which time the victim develops green skin and eventually undergoes the more drastic physical changes to reach the final form.

D&D Monsters: Djinn

The djinn originate in Middle Eastern mythology; they are typically associated with Islamic beliefs today, but pre-date that religion. They were originally human-like beings with magical powers, perhaps associated with a creation preceding that of humans and, at least by Islamic times, were regarded as neither inherently good nor evil. In modern western culture, they are mainly thought of as granting wishes and being trapped in lamps, ideas that come from an 18th-century edition of One Thousand and One Nights, although the specific legend is presumably older - they are not part of the original concept of djinn.

In D&D, djinn are described as powerful inhabitants of the Elemental Plane of Air, since many  (although by no means all) of the magical powers associated with them in myth are linked with the air. In the game, the alternative Anglicised name for the beings, "genie", instead refers to a broader category of being, of which the djinn are merely one of the most common. While the wish-granting, oil lamp dwelling, sort of djinn are stated to exist in the universe they are, at best, extremely rare and not typical representatives of their kind.

D&D Monsters: Golems

The golem is a creature of Jewish myth; a man formed of clay, as Adam was said to have been, and brought to life by a skilled rabbi. This usually involves a holy word, either written on parchment and placed in the golem's mouth or carved directly into its forehead. The resulting golem works as a servitor, and is incapable of speech. In the most famous version of the tale, it eventually goes berserk when its creator forgets to deactivate it on the Sabbath, and it ends up breaking the holy commandment not to work at such times.

In D&D, however, the word is used for a much larger class of creatures, humanoid forms made of pretty well any material and animated to serve their creator. Some of these, too, have a habit of going berserk, although the trigger for doing so is decidedly more random.

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Clay Golem

The clay golem is, of course, the one that most closely resembles the being in the original myth. In this respect, it's notable that it has to be created by a powerful priest (and, in, 1E, specifically a priest of a benevolent deity), rather than a wizard or necromancer. In 1E, it is shown as a humanoid figure sculpted from clay and apparently wearing a loincloth. For all we can tell from the picture, this might be a part of the moulded clay, just an artistic convention by its creator, but, from 2E onwards, we're told that a leather jockstrap is an essential accoutrement for all clay golems.

DW Monsters: The Ambassadors

Having completed the seven key humanoid aliens of the show (other than the Time Lords themselves), I’m now going to turn to aliens that appeared less frequently, as well as those that are less humanoid in form. One of the ground rules here is that I will still be looking at races, and not at beings that are said to be unique, or that are unusual or “high level” examples of their kind. I’ll also pass over races that aren’t, in terms of basic game statistics, especially notable, most often because they’re physically indistinguishable from humans.

I’m going to approach this by running through the eras of the various TV incarnations of the Doctor. The first batch consists of “monsters” and other aliens that appear during the Third Doctor’s era, of which there are quite a few.

•        Spearhead from Space is the Third Doctor’s debut story, and features the autons.
•         Doctor Who and the Silurians is the debut for the eponymous reptiles.

D&D Monsters: Flesh Golems

The flesh golem, as depicted in D&D, is quite clearly based on Frankenstein's Monster. This, of course, has its origin in Mary Shelley's original story, but it's probably fair to say that most people's perceptions of the creature are more heavily influenced by the take on it in the Universal Pictures horror films of the 1930s. So it is with the flesh golem, which owes rather more to the movie version than to that in the novel, despite attempts to transform its look from 2E onwards.

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1E

The debt to Frankenstein's Monster is particularly clear in the 1E illustration, which gives the golem the high, almost cylindrical head seen in the 1930s film version. Otherwise, the golem is an animated humanoid apparently stitched together from pieces of human body; it is hairless with a lantern jaw and distinct brow ridges. It is stated to be 7½ feet (230cm) tall which, given that this is obviously taller than the vast majority of humans, implies that either the magical process which creates it enlarges the original body parts or that multiple pieces are grafted together to make the body. 

D&D Monsters: Pixies

Pixies are a form of fairy originally found in the folklore of southwest England, specifically Devon and Cornwall. They are typically more benign than many other fairies, but still mischievous and inclined to cause trouble for humans. In D&D, they were one of four races of fairy-like beings in the original Monster Manual, and seem to be intended as a bit of light-hearted relief, a potentially humorous inconvenience, rather than dangerous monsters to be slain. Of the four originals, they are the only ones to remain in the core monster books for both third and fifth editions.

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1E

As originally described, pixies look much like elves, except for being only 2'6" (75cm) tall. Or at least, that's what the text says, since the pixie in the picture looks a lot smaller than this. Assuming that the stated figure is accurate, however, it's still a good four inches (10 cm) shorter than a typical two-year-old human child. This makes them the tallest of the four fairy races, and far closer in height to a halfling than, say, a dwarf is to a human.  More distinctively, of course, they have two pairs of wings projecting from their back, which look to be similar to those of a dragonfly. 

DW Monsters: Ood

The final race on my initial list of key humanoid ‘monster’ races is also the only one unique to the modern era of the show. (I’m not currently planning on suspending the series after this post, although it will remain low priority; I’ll explain where it’s going next once I get there).

Appearances

By far the most recent of the seven races I’m listing as key humanoids in this series, the Ood made their debut in the Tenth Doctor story The Impossible Planet in 2006, over 30 years after the next oldest on that list. They returned two years later in Planet of the Ood, in which we learn of their origin, and have made significant appearances in three further TV stories since then, most recently Flux. That’s ignoring short “tardisodes” and the like, some of which have also featured them, and the occasional brief cameo elsewhere.

D&D Monsters: Couatls

The couatl has its basis in Mesoamerican mythology, although it's arguable how much it resembles the original. The name is apparently inspired by that of the Aztec god Quetzalcoatl the "feathered serpent". In reality, coatl simply means "snake" so it doesn't refer to any specific mythic creature taken on its own. Having said that, snakes were important to the Mesoamerican people, and associated with many of their gods. In particular, several of them were feathered, magically merging the features of a flying creature with one that crawls along the ground. They seem to have been regarded as divine beings, which fits with the original 1E description of their habitat and relationship with humans.

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1E

As originally seen, the couatl has a head and body that closely resemble those of a regular snake. While the presence of an extra set of teeth between the fangs is unusual, in other respects, the arrangement of the teeth resembles those of snakes such as cobras, kraits, and mambas, rather than say, rattlesnakes or boomslangs. While the head is at least partially covered with scales like that of a normal snake, the couatl's body is feathered, with longer feathers along the back and what appear to be softer, downy, ones on the underside. 

D&D Monsters: Beholders

The beholder is, perhaps, the single most iconic monster in D&D - the one creature that, more than any other, says "this is D&D" rather than some other fantasy setting. That's largely due to its unique appearance, which is quite unlike anything that exists in myth or legend or, indeed, in prior fiction. It was created, not by Gygax, but by one of the players in his original campaign, first appearing in a supplement for 0E, and has successfully stood the test of time ever since.

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1E

As originally shown, the beholder is a spherical creature covered in irregular, flat, "chitinous" plates. A wide mouth occupies much of the lower half and is lined with small pointed teeth similar to those of reptiles. There is a single large lidless eye above the mouth and ten much smaller eyestalks arranged in a ring around the upper surface. The latter are protected by segmented chitin and have also have lidless eyes, similar to those of a snail or slug, although the eyestalks presumably aren't retractable. Severing the eyestalks doesn't otherwise hurt the creature, which suggests that it's able to shut off the blood supply to a severed stalk - or perhaps that it doesn't have blood. There are no other visible features, such as nostrils.

DW Monsters: Cybermen

Mk V

The Cybermen are surely second only to the Daleks as iconic Doctor Who monsters. It also seems to me that they are most significant such race that could be described as “humanoid”, and so are arguably overdue for an appearance here in my list of key races in that category.

This one, by the way, is going to be a long post. There’s a lot to cover!

Note: Since I started this series of posts, Cubicle 7 have announced a 5E version of their existing Doctor Who RPG. I'll continue posting my 5E interpretation of stats here, at least for the time being. Although it's likely they'll be very different from the "official" versions, not least because there will presumably be some difference in the fine details of the systems, these posts do at least include my reasoning.

Appearances

The Cybermen have the distinction of being the first “monster” other than the Daleks to appear in more than one story. They are also the oldest of the races in my pick of the top seven humanoid monsters, dating back all the way to the First Doctor’s era and his final story The Tenth Planet. Frequently re-invented since that first appearance, they appear no less than four times in the Second Doctor’s era (whereas the Daleks only appear twice). The Third Doctor is the only classic-era Doctor not to have a TV story featuring them, with Doctors Four to Seven having one major Cyberman story each, not counting their brief appearance in The Five Doctors. Skipping the Eighth and Ninth Doctors because of their short runs, every modern Doctor from Ten onwards has faced them. In total, that’s 23 stories featuring Cybermen as more than brief clips or mentions.

D&D Monsters: Otyughs

There has been some speculation that the otyugh is based on the tentacled monster in the trash compactor in the first Star Wars film (referred to in the tie-in material as a "dianoga"). Certainly, there is a resemblance, especially given that we don't see the whole creature in the film; based on that alone, the rest of the body could look like almost anything. On the other hand, the film only came out a few months before the otyugh made its debut so it would have to have been a very last-minute addition to the 1E Monster Manual if that really was the source. More likely, it's a coincidence, leaving the D&D monster as an original creation.

D&D Monsters: Ropers

The roper is another of the "does what it says on the tin" monsters that are original to D&D. Alongside such creatures as trappers and piercers, it's clearly intended to disguise itself as part of the background and attack unexpectedly but does have a more distinctive look and an unusual method of attack that make it more memorable than they are, with the result that it consistently appears in the core Monster Manual books of each edition.

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1E

In the original Monster Manual, the roper is a tapered pillar-like creature with a single large eye above the mouth near the top of the body - there are no apparent nostrils or ears. The eye has an odd brow-like structure that seems to partially cover the upper surface; this might be a ridge to protect it from falling debris, since it lives in caves and there's plausibly a lid that flips down from it as well. The mouth opens horizontally and has pointed isodont teeth in both jaws, although it seems unlikely that the creature has much of an internal skeleton to attach them to. The base is limbless and flat to the ground, while a vertically arranged row of three apparent tentacles arise from each side.

DW Monsters: Autons

It’s arguably a bit of a stretch to describe the autons as a “humanoid race”, but nonetheless, they are the fifth race I’m going to describe here.

Appearances

The autons make their debut in the first Third Doctor story, Spearhead from Space, making them the third race to appear in my list from that era (which is itself the only era to appear on the list more than once). They reappear only once more in the classic series, in Terror of the Autons at the start of the next season, and twice in the modern series, most notably in the Ninth Doctor’s debut story, Rose.

Outside of the TV series, they featured in a three-part straight-to-video series in the 1990s which, as with Sontarans and Zygons, indicates a certain degree of popularity. That, of course, existed outside the Doctor Who license since autons, like many other original races, have separate copyright status. But in material officially licensed by the BBC, they have so far appeared in three novels, two with the Sixth Doctor, and one with the Tenth. In the audios, they have faced the Doctor only once to date, but they have appeared in a Torchwood audio and a four-part box set featuring UNIT that, in some respects, updates Spearhead from Space for the 2010s. And, as one might expect, there are also a parade of shorter appearances in comics and short stories.

D&D Monsters: Mind Flayers

The mind flayer is a creature original to D&D and, like many of Gygax's early creations has a "does what it says on the tin" style name. To my mind, it's one of the better such names - although almost anything is better than, say, "lurker above". The look of the creature is obviously reminiscent of H.P. Lovecraft's Cthulhu, and Gygax stated that it was inspired by the cover of a book by Brian Lumley that does, indeed, feature a being from the Mythos. But, as it happens, it isn't the Big C himself that's on the cover, but a chthonian, a creature with a similar name, to be sure, but actually rather different. Still, it has tentacles and this, seemingly, was enough.

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1E

The mind flayer goes through relatively little change in physical appearance through the various editions of the game, to the extent that the few changes that are apparent could easily be put down to variations between individuals of the same species. Even the clothing doesn't change much, with the race clearly having a preference for robes and insisting on a skull motif somewhere on their belt. 

D&D Monsters: Umber Hulks

The origins of the D&D umber hulk are not clear. It predates what we'd now call 1E, first appearing in the Greyhawk supplement, and it has been proposed that it may be based on one of the same set of plastic toys that inspired the owlbear, rust monster, and bulette. If so, it doesn't closely resemble any of them, while the other three are very clearly drawn to resemble the toys in the 1E Monster Manual. So, if it's inspired by them at all, the connection is still vague enough that, to all intents and purposes, it's an original creation. Certainly, its signature power is original, doubtless intended to be related to its unusual appearance and, while evil sorcerers might be able to do something similar in myth, the same is not generally true of monsters.

DW Monsters: Zygons

The fourth race on my list of the seven key humanoid ‘monster’ races are the shape-shifting Zygons.

Appearances

The Zygons have a slightly unusual history, compared with those I’ve dealt with so far. They first appear slightly later, during the fourth Doctor story Terror of the Zygons, but that’s not the oddity. They immediately stood out due to a distinctive design and a particularly well-respected debut story and after that they… well, they just didn’t appear again in the classic series. In fact, they didn’t appear on TV again for another 38 years, although they have now shown up as significant antagonists twice in the modern era.

D&D Monsters: Devils

In regular English, the term 'devil', when not applied specifically to Satan, is essentially synonymous with 'demon'. Whereas the word 'demon' originally had a more benign meaning, 'devil' has always meant an evil entity, and now typically means one that is specifically part of the Christian mythos even if the general concept exists in other religions, too. 

In D&D, however, devils are distinct from demons, making up the organised legions of Hell rather than being rampaging creatures of malevolent chaos. In 1E, six main types exist, although other common ones have been added since, all fitting within a defined hierarchy where weaker devils can (with difficulty) be promoted to higher ranks at the whims of those even higher up the chain. Compared with the demons, these six standard types are more likely to owe their origins to myth or at least to traditional depictions of such beings, rather than just being odd combinations of animal parts. 

D&D Monsters: Erinyes

The Erinyes originate in Greek myth, where they are goddesses of vengeance cursing kinslayers, oathbreakers, and the like; they are probably better known under their Roman name of "Furies". These original versions appeared as ugly women, typically with snakes entwined in their hair and wrapped around their bodies and limbs. Sometimes they had wings, sometimes not, and later depictions of them are similarly varied.

Some versions of the myths state that there are only three Erinyes, but others are much vaguer about the numbers. Notably, the three named Erinyes stand guard over the City of Dis surrounding the Sixth Circle of Hell in Dante's Inferno. It may be this that inspired their adoption as a type of "devil" in D&D, although they (and Dis) are moved to the Second Circle in the 1E Monster Manual, befitting their status as the weakest of the true devils in that edition. Something of a demotion from their mythic origins, then.