THE HOESE. 



351 



only by the splint-like metacarpal bones. The third meta- 

 carpal, which is somewhat flattened from before backwards, 

 is nearly symmetrical in itseK. Careful observation, how- 

 ever, shows the inner moiety to be rather the broader. 



There are two large sesamoid bones (the greater sesamoids) 

 developed in the ligaments which connect the metacarpal 

 with the basal phalanx; and one transversely elongated 

 sesasmoid gives attachment to the tendon of the perforating 

 flexor, and lies upon the ventral aspect of the joint between 

 the middle and the distal phalanx. 



The ossa innominata are elongated, and their long axes, 

 on the length of which depends the proportional size of the 

 " quarter " of a Horse, form an acute angle with the spine. 

 The crests of the ilia are wide and directed transversely, 

 and the symphysis pubis is very long. 



Fig. 99. 



Fig. 99.— The ossa innominata of a Horse vie-ved from the left side 

 and behind. 1. The crest of the ilium. 2. The surface by whicii it 

 articulates with the sacrum. 4. The acetabulum. 6. The ischium. 



The femur has a large third trochanter (', Fig. 100), into 

 which the glutceus maximus is inserted. Its head presents a 



