212 CHORD ATA, 



Order 6. Proboscidea. Pentadactyle hoofed Mammalia with prehensile 

 proboscis, two tusk-like continuously growing upper incisors, no canines, 

 and composite grinding teeth. Placenta zonary. Mastodon, Miocene 

 to Pleistocene. Deinotherium, with two tusk-like lower incisors. Mio- 

 cene. Elephas primigenius, mammoth, Pleistocene, E. (Euelephas) 

 Indicus, Indian elephant, S. Asia, E. (Loxodon) Africanus, African 

 elephant, Africa S. of the Sahara. 



Order 7. Hyracoidea (Lamnugia), conies. Small rodent-like Mammals 

 with pentadactyle (but two digits rudimentary) manus and tridac- 



O f\ A. \ *%. 



tyle pes. Dental formula , upper outer incisors soon fall out, 



upper median incisors chisel-like, and continuously growing. Placenta 

 zonary. Hyrax, Africa and Syria. 



