equivalent. Cave bear (Ryth) - It first appeared in At the Earth's Core. Cave hyena - Pellucidarian name unknown. It first appeared in Pellucidar. Cave lion (Ta-ho) - It first appeared in At the Earth's Core. Cotylosaurus (Gorobor) - Giant lizardlike reptiles which serve as the Horibs' mode of transportation, as they are the fastest creatures in Pellucidar. They first appeared in Tarzan at the Earth's Core. Deinotherium - Pellucidarian name unknown. It first appeared in Tarzan at the Earth's Core. Dimetrodon - Pellucidarian name unknown. Dimorphodon - Pellucidarian name unknown. Diplodocus (Lidi) - It first appeared in At the Earth's Core. Dire wolf (Codon) Giant Ants - No outer world equivalent. Pellucidarian name unknown. They are six feet long and are preyed upon by the Ant Bears. Goats - They are domesticated by the Ape-Men. They first appeared in At the Earth's Core. Gomphotherium - Pellucidarian name unknown. Hyaenodon (Jalok) - A doglike carnivore which is not related to either hyenas or wolves. They have been referred to as Wolfdogs and can be domesticated by the Ape-Men. In Pellucidar David domesticates two of them. It first appeared in At the Earth's Core. Hydrophidian - A giant sea snake that is designated by Burroughs. Neither the actual outer world or Pellucidarian equivalent are known. It first appeared in At the Earth's Core. Hyracotherium (Orthopi) - It first appeared in At the Earth's Core. Ichthyosaurus (Azdyryth) - It first appeared in At the Earth's Core. Labyrinthodont (Sithic) - A giant carnivorous amphibian. It first appeared in At the Earth's Core. Mastodon (Maj) - It first appeared in Tanar of Pellucidar. Megacerops (identified by its synonym Brontotherium) - Pellucidarian name unknown. Megaloceros - Pellucidarian name unknown. It first appeared in Pellucidar. Megatherium (Dyryth) - It first appeared in At the Earth's Core. Phorusrhacos (Dyal) - It first appeared in Tarzan at the Earth's Core. Plesiosaurus (Tandoraz, Ta-ho-az) - The two Pellucidarian names refer to large and small varieties. It first appeared in At the Earth's Core. Pteranodon (Thipdar) - It first appeared in At the Earth's Core. They are sometimes used as the pets and guard animals of the Mahars. Pterodactylus (Thipdar) - It first appeared in At the Earth's Core. Rhamphorhynchus (Mahar) - An oversized species of intelligent pterosaurs. It first appeared in At the Earth's Core. Sharks - The sharks of Pellucidar are larger than normal sharks. Smilodon (Tarag) -