CLASSIFICA TION OF VER TEBRA TA 45 



Marine, littoral, since the Eocene period. 

 Prorastomidae. Prorastomus. Eocene, Jamaica. 

 Manatidae. Manatus. Atlantic basin, tropical America 

 and Africa. 



Halicoridae. Halitherium. Eocene and Oligocene, Europe. 



Rhytiodus. Miocene, France. 



Felsinotherium. Pliocene, Italy. 



Halicore. Indian Ocean, Africa to Austro-Malaya. 



Rhytina. North Pacific, exterminated in 1768. 

 5. Order Ungulata, Wagner. 



Herbivorous, terrestrial, diphyodont. Without clavicles. 

 Toes encased in hoofs, excluding Hyracoidea. 



1. Sub-order HYRACOIDEA. Small, plantigrade, with 

 | toes. Carpalia and tarsalia serial. Fibula complete, articu- 

 lating with the astragalus, not with the calcaneum. 



Dentition ^ $ tvf > incisors rodential. 

 Placenta zonary, deciduous. Gut with one sacculated and 

 two conical caeca (unique). 



Hyracidae. Hyrax and Dendrohyrax. Cape to Syria. 



2. Sub-order TOXODONTIA, Owen. Semiplantigrade, with 

 -| toes. Carpalia and tarsalia alternating. Fibula complete, 

 articulating with the calcaneum and astragalus. Some of the 

 upper and lower incisors enlarged. 



Tertiary epoch of South America. 



Toxodon, Nesodon ; size from that of a sheep to that 

 of a rhinoceros. 



3. Sub-order AMBLYPODA, Cope. Semiplantigrade, with 

 ^ toes. Carpalia alternating, tarsalia and metatarsalia serial. 

 Fibula complete, articulating with the astragalus, not with the 

 calcaneum. 



Upper canines enlarged. 



Eocene epoch of Europe and America. 



Coryphodon. Eocene of England, France, Wyoming, 

 New Mexico. 



Uintatherium (Dinoceras). Eocene of Wyoming. 



Astrapotherium. Patagonia, 



4. Sub-order PROBOSCIDEA, Illiger. Semiplantigrade her- 

 bivora with |- toes. Carpalia serial, tarsalia slightly alternating. 

 Fibula complete, articulating with astragalus and calcaneum. 



