THE SKELETON. 



73 



in two rows (Fig. 36). Beginning on the pollex side, the 

 scapholunar, cuneiform, and pisiform compose the proxi- 



F 



H 



A L 





V 



FIG. 35. GENEALOGY OF THE HORSE. 



F, Forefoot; H, hindfoot; A, forearm; L, leg; I, Orohippus or Pachyno- 

 lophus; II, Mesohippus; ///, Miohippus; IV, Protohippus; V, Plio- 

 hippus; VI, Equus; 2, 3, 4, and 5 are the second, third, fourth, and 

 fifth digits respectively; me, metacarpus; mt, metatarsus; p, pha- 

 langes; u, ulna; r, radius; /, tibia; /, fibula. (After Marsh.} 



mal row, and the trapezium, trapezoid, magnum, and 



