Hands of Vertebrates
A comparison of vertebrate hands. A, hand or anterior foot of the dog; B, that of the hog; C, that of the elk; D, that of the ox. Digits: I, pollex; II, index; III, medius; IV, annukus; V, minimus.
Vaughn, I. Strangeway's Veterinary Anatomy (Toronto, CAN: J. A. Carveth & Co., Ltd., 1904)