The foot, which, as in the case of the hand, rests on the ground by the whole extent of its plantar surface, presents five toes; the shortest of these is the internal--that is, the toe which corresponds to the great-toe in man; the third and fourth are the longest, and they are almost equal; there is a very slight difference in favour of the fourth, which is slightly superior in dimensions to the third. =Digitigrades=: =Cat=, =Dog= (Fig. 34, p. 52).--The external iliac fossa, which looks outwards, is deep; the iliac crest is convex anteriorly, the convexity is continued from one iliac spine to the other. [Illustration: FIG. 49.--PELVIS OF THE DOG, SEEN FROM ABOVE. 1, Iliac crest; 2, external iliac fossa; 3, sacrum; AA´, bi-iliac diameter; BB´, bi-ischial diameter.] In the dog, the distance which separates the anterior iliac spines is less than that which separates the ischia (Fig. 49). On a skeleton which we measured, the transverse diameter, the distance from the anterior iliac spine of one side to that of the opposite side, was 8 centimetres, whilst the distance which separated the ischia was 105 millimetres; on another skeleton, the first measurement was 127 metres, and the second was 146 millimetres. It seems to us unnecessary to multiply examples. In the cat, the iliac spines are but slightly marked; the result is that the iliac crest is almost confounded with the inferior and superior borders of the ilium. The two diameters referred to above are almost equal (Fig. 50). We draw particular attention to what we have just noted in regard to the transverse proportions of the iliac and ischiatic regions of the dog and the cat. These relations are evidently of importance with regard to shape, since the iliac crests and the ischia are noticeable beneath the skin. [Illustration: FIG. 50.--PELVIS OF A FELIDE (LION), VIEWED FROM ABOVE. 1, Iliac crest; 2, external iliac fossa; 3, sacrum; AA´, bi-iliac diameter; BB´, bi-ischial diameter.]