MAMMALIA. 577 
Fig. 391.—Manus OF ARTIODACTYLA. (Ad nat.) 
A Ulna. B Ulna. Cc Ulna, 
Line of Fusion of Metacarpals 3 and 4. 
Line of Fusion of Metacarpals 3 and 4. 
A, The Pig, third and fourth metacarpals are free and there are four functional 
toes. B, Dorcatherium, closely resembling the pig. C. Tragudus, 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. 
