''Pellucidar'' is a series of seven novels written by Creator/EdgarRiceBurroughs, written and taking place in the [[TheEdwardianEra 1910s]], [[TheRoaringTwenties 1920s]] and [[TheGreatDepression 1930s]]. In this {{verse}}, the [[WorldShapes Earth is hollow]] and there is another world on the inside, called Pellucidar, inhabited by dinosaurs and others monsters as well as primitive humans.

The complete series is composed of the following novels:

* ''At the Earth's Core''. Published in serial form in April, 1914. Book form published in July, 1922.
* ''Pellucidar''. Published in serial form in May, 1915. Book form published in September, 1923.
* ''Tanar of Pellucidar''. Published in serial form from March to August, 1929. Book form published in May, 1930.
* ''Tarzan at the Earth's Core''. Published in serial form from September, 1929 to March, 1930. Book form published in November, 1930.
* ''Back to the Stone Age''. Published in serial form from January to February, 1937. Book form published in September, 1937.
* ''Land of Terror''. First published in 1944. Unusually the book was its original form.
* ''Savage Pellucidar''. Collects four Pellucidar short stories. Three from 1941 and 1942, and one previously unpublished story. The collection was first published in 1962.

Several {{pastiche}} novels followed.

A loose film adaptation of ''At the Earth's Core'' was made in 1976 by Creator/AmicusProductions, which was riffed in the season 11 finale of ''Series/MysteryScienceTheater3000''. Pellucidar also appeared in the pilot for ''Series/TarzanTheEpicAdventures,'' which was based partly on ''Tarzan at the Earth's Core.''

For the [=MST3000=] episode, go [[Recap/MysteryScienceTheater3000S11E14AttheEarthsCore here]].


* AllAnimalsAreDogs: With a Hyaenodon, no less. Innes even ''calls'' it a dog!
** To be fair, David isn't a paleontologist, and just looking at the thing, [[http://www.ljplus.ru/img3/c/r/crazy_zoologist/hyaenodon_pic.jpg it's an easy mistake to make.]]
* BeneathTheEarth
* BlueAndOrangeMorality: The Mahars aren't evil; they simply lack any concept of sound, and so they don't understand the other creatures they treat as slaves are intelligent, communicating beings in their own right.
* CannotSpitItOut
* CanonWelding: The fourth book, ''Tarzan at the Earth's Core,'' quite clearly defines the Tarzan and Pellucidar novels as part of the same continuity, with the usual heroes teaming up with Tarzan and his allies for a {{Crossover}}.
* ClusterFBomb: Thanks to the time period Burroughs couldn't actually write it, but he still manages to make very clear that Perry's reaction to his drill refusing to turn at the start of the adventure would make a sailor blush.
* ContrivedCoincidence
* CultureClash
* DamselInDistress
* DeadpanSnarker: David Innes.
* DidNotGetTheGirl: Film-only. Dian decides there's NoPlaceForMeThere on the surface, and David leaves her behind.
* DirectLineToTheAuthor: In the first novel, Burroughs claims to have had the story of David Innes' adventure in Pellucidar direct from Innes, having met him during a safari in the Sahara desert some time afterward. Each of the sequels mentions that they've stayed in touch and Innes has been keeping him informed of subsequent events.
* DrillTank: The "iron mole".
* DuelToTheDeath: David Innes versus Jubal the Ugly One in ''At The Earth's Core.''
* DumbDinos: Most of the dinosaurs come off this way, with the exception of the Mahars, who are sapient pterosaurs.
* EverythingsBetterWithDinosaurs
* EverythingsBetterWithPrincesses: Dian the Beautiful.
* EvilAlbino: The Gorbuses are a subterranean race of cannibalistic albinos who are apparently resurrected surface-world murderers.
* EndlessDaytime: As Pellucidar is a HollowWorld that has a sun at the centre, it is always noon no matter where you are.
* FrazettaMan: Sagoths, Ape Men, Beast Men...
* GadgeteerGenius: Abner Perry, inventor of the DrillTank that takes him and David Innes to Pellucidar.
* HiveMind: The Mahars compose one.
* HollowWorld: The Earth is hollow.
* HypnotizeThePrincess: The Mahars of Pellucidar hypnotize ''everybody''.
* IOweYouMyLife: David Innes saves Ja of the Mezops in ''At The Earth's Core''.
* LivingDinosaurs
* LostWorld
* MadeASlave: David Innes is enslaved (briefly) by the Sagoths, joining Dian the Beautiful and others who are already in a slave train in ''At The Earth's Core''.
* TheMagnificent:
** Dian the Beautiful.
** Dacor the Strong One, Ghak the Hairy One, Hooja the Sly One, Jubal the Ugly One... etc.
* MightyWhitey: The people from the surface who come to Pellucidar. Something of a variant, as there are other white people in Pellucidar; the surface dwellers are (generally) mighty because of their more technologically advanced culture.
** Except for Tarzan. The Jungle Lord needs no technology to show the cavemen who's boss.
* NubileSavage: Dian the Beautiful. All of her people, too, the Tribe of Amoz. Also their neighbors, the people of Sari.
* {{Pirate}}: The Korsars (corsairs) of Pellucidar.
* ReptilesAreAbhorrent: The Mahars, a race of [[NinjaPirateZombieRobot sentient psychic pterosaurs]], appear as the first major villainous race in the series.
* SpiritualSuccessor: It's long been speculated that this series was an indirect inspiration for ''Literature/AtTheMountainsOfMadness.''
* TravelingAtTheSpeedOfPlot: Some of the stories played with the notion of time as highly variable in a situation where there's no day-night sequence to measure it by. David Innes was once accidentally separated from his comrade and went through several ''weeks'' worth of adventures. When they were reunited, he discovered that since his friend hadn't needed to exert himself to anywhere near the extent David did, for him ''less than an hour had passed''.