60 EQUINE ANATOMY. 



of the great adductor of the thigh, through the pos- 

 terior vascular groove of the femur, and to the superior 

 extremity of the bifemoro-calcaneus muscle where it 

 becomes popliteal. Its collateral branches are : 1 — The 

 prepubic, rising with the deep musculara-unnin^ through 

 the crural ring on the anterior face of^thecrural arch, 

 ^ l^ hohmd the nock 9f thq vagintuchoat ri, and terminates in 

 the posterior abdominal and the external pujtic arteries. 

 ' The posterior abdominal runs forward between the 

 small oblique and traiisverse muscles, of tlie abdomen, 

 along the external border of the rectus abdominis, 

 w^here it ends by anastomosis with the anterior abdom- 



inal;'^ The external piAic descends on the posterior 

 wall of the in o:uinal canal, at the inferior rinoj of which 

 it ends in the', sub-cutaneous abdominal and the anterior 

 dorsal of the penis ; the sub-cutaneous abdominal 

 anastomoses with its congener at the umbilicus; the 

 anterior dorsal of the penis passes to the superior bor- 

 der of the penis and ends in ascending branches to 

 the cavernous artery, and descending branches to the 

 erectile tissue at the extremity of the organ. In the 

 female, the dorsal of the penis becomes the mam- 

 mary, distributed to the mammae. 2 — Deep mus- 

 cular, or profunda, runs backward between the psoas- 

 iliacus and pectineus muscles, then between the pec 

 tineus and the external obturator, under the adductor 



