XVI.] 



UNGULA TA. 



269 



equally developed, and their ungual phalanges flattened on 

 their inner or contiguous surfaces, so that each is symmetri- 

 cal in itself, but when the two are placed together they form a 

 figure symmetrically disposed to a line drawn between them. 

 Or, in other words, the axis or median line of the whole 



/m 



g ''4 



Fig. 98. 



Fig. 96. — Bones of the manus of Pig {Sus scrofa), \. 



Fig. 97. — Bones of the manus of Red Deer (Cemits elapJnis), \. 



Fig. 98. — Bones of the manus of Camel {Cameins bactriatms), \. 



manus is a line drawn between the third and fourth digits, 

 while in the Perissodactyles it is a line drawn down the 

 centre of the third digit. 



In the Sidfia, Pigs (Fig. 96), Peccaries, and Hippopotamus, 

 the second and fifth toes are well developed, though always 



