A DESCEIPTIVE CATALOGUE 



OF THE 



TERTIARY VERTEBRATA 



OF 



THE FAYUM, EGYPT. 



Class MAMMALIA. 



Order UNGULATA. 



Suborder BARYPOBA. 

 [C. W. Andrews, Geol. Mag. [5] vol. i. (1904), p. 481.J 



Full entherian dentition without diastemata. Molars tending to become hypsodont ; 

 premolars differing widely from molars. Anterior palatine foramen very large and 

 single. Alisphenoid canal present; no condylar foramen hitherto observed. Brain- 

 cavity relatively much larger than in the Amblypoda. No entepicondylar canal in the 

 humerus ; no third trochanter in the femur. Both feet probably pentadactyl. Fore 

 foot much like that of the Proboscidea ; the metacarpals alternating to the same extent 

 as in Elephas, and the scaphoid closely similar to that of the latter genus. Ulna 

 entering into the carpal joint much more extensively than the radius ; the cuneiform 

 consequently large and sometimes overlapping the magnum, and the scaphoid relatively 

 small. Hind foot differing widely from that of the Proboscidea, and approaching that 

 of the Amblypoda. Astragalus and calcaneum both bearing large fibular facets ; the 

 low broad astragalus articulating distally with the cuboid and navicular, the former 

 having only a small surface of contact with the calcaneum. A small tibiale probably 

 present. 



From the shape of the calcaneum it seems probable that the heel sometimes rested 

 on the ground. 



B 



