MAMMALIA. 



577 



Fig. 391. — Man us of Artiodactyla. (Ad nat.) 



A Ulna. B Ulna. C Ulna. 



D E F 



A, The Pig, third and fourth metacarpals are free and there are four functional 

 toes. B, Dorcatherium^ closely resembling the pig. C, Tragulus, with third and 

 fourth metacarpals fused, second and fifth still entire. D, Deer. E, Sheep, and F, 

 Camel, showing gradual disappearance of second and fifth toes and of ulna. 



M. 



38 



