The Reproductive Organs 



337 



the epididymis lies upon its external face, above the gland. The 

 relation as to elevation between the testicle and epididymis be- 

 comes reversed. In the abdomen, processus vaginalis and in- 

 guinal canal, the epididymis is beneath the testicle and precedes 

 it in the descent but, when the testicle finally reaches the bottom 

 of the scrotum, it performs a partial revolution forwards on its 

 long axis, which reverses the relation and brings the epididymis 



Fig. 56. Genitourinary system of a foal, 24 hrs. old, to illustrate descent 

 of testicles and behavior of ruptured unibilic arteries. 



The central portion of the abdominal floor has been partly excised and 

 laid back. Seen from below. 



T, Testicle. A, Artery of testicle. G, (iubernaculum te.stis. V. Vas def- 

 erens. B, Bladder. UA, Ruptured ends of umbilic arteries retracted within 

 abdomen. P, Processus vaginalis UV, UmV)ilic artery. 

 22 



