58 ELEMENTS OF MAMMALIAN ANATOMY. 
radius, cuneiform, unciform, magnum, trapezoid, and tra- 
pezium. The cuneiform articulates with the ulna, unci- 
form, pisiform, and scapholunar. The pisiform is next to 
the scapholunar in size. It projects prominently laterad 
me 
j hf) 
“ Bt? A 
s | {it 
mt 
: is 
2GE 2 e, 
ra c 
Se J; 4 
Fic. 35. GENEALOGY OF THE Horse. 
F, Forefoot; H, hindfoot; A, forearm; L, leg; J, Orohippus; IJ, 
Mesohippus; /7/, Miohippus; //’, Protohippus; V’, Pliohippus; V1, 
Equus; 2, 3, 4, and 5 are the second, third, fourth, and fifth digits 
respectively; mc, metacarpus; mf, metatarsus; p, phalanges; u, 
ulna; r, radius; t, tibia; f, fibula —-( (After Marsh.) 
NR 
