CATALOGUE OF UNGULATES 



Its existing representatives are divisible into four sub- 

 ordinal groups, of which the names and leading distinctive 

 features are as follows : 



A. The bones of the upper and lower transverse rows 

 of the wrist- joint, or carpus, alternating with 

 one another, so as to permit the os magnum to 

 articulate with the scaphoid (instead of the 

 lunar or cuneiform) ; toes never more than 4 in 

 number. 



a. The two middle toes (which may be the 

 only ones), or those representing the 3rd 

 and 4th of the 5-toed foot, equal in size 

 . ; f " n,l symmetrical to a vertical line drawn 

 V :feiwe,en them. Distribution co-exten- 

 sive with: that of the whole order ARTIODACTYLA. 



}&: The: tlfrird .toe (which may be the only 



' ' one) larger than the lateral ones (when 



present), and symmetrical in itself. 



Restricted at the present day in a wild 



state to the Old World PERISSODACTYLA. 



JI IG- i. BONES OF THE RIGHT FORE-FEET OF THE 

 PIG (A), THE DEER (B), AND THE CAMEL (C). 



M, radius ; U, ulna, below which come the two rows of small 

 bones constituting the carpus, or wrist ; c, cuneiform ; I, 

 lunar ; s, scaphoid ; u, unciform ; m, magnum ; td, trapezoid. 



The Roman numerals indicate the toes. 

 From Flower's Osteology of the Mammalia. 



