DISSECTING MANUAL. 



of which the anterior is the more convex and free ; the borders 

 end in the upper and lower extremities. It lies in the scrotum 

 with its long axis directed upward, slightly forward, and 

 outward. [1159] 



The epididymis is a crescentic structure curving round and 

 attached to the posterior border of the testis and overlapping 

 the outer surface behind. Its enlarged upper end (globus 

 major) overhangs the upper end of the testis and is attached 

 there by emerging ducts, connective tissue, and the serous cov- 

 ering; its small lower end is attached to the lower end of the 

 testis by areolar tissue and the serous covering; its interme- 

 diate part (body) is separated from the back of the outer sur- 

 face of the testis by an involution of the serious covering, which 

 forms a pocket (digital fossa) under it. One or two minute 

 pedunculated bodies (hydatids) are usually attached to the 

 upper end of the epididymis or testis. [1160] 



The tunica vaginalis is a serous membrane lining (parietal 

 portion) the scrotal cavity and reflected from its posterior 

 wall onto (visceral portion) the epididymis and testicle. It 

 covers them completely, except the back of the epididymis 

 and where the testicle and epididymis are united. A small 

 crescentic fold descends from the lower part of the testicle or 

 epididymis. [1160] 



Structure. The testicle has an external coat (tunica albu- 

 ginea) of dense white fibrous tissue; from this septa (septula 

 testis) run inward, dividing the gland into lobules, and ending 

 behind in a fibrous mass (mediastinum testis, or corpus High- 

 mori) which projects forward along the posterior border of the 

 tunica albuginea. Numerous convoluted tubules (seminifer- 

 ous) occupy the lobules and unite to form a smaller number of 

 straight tubules (tubuli recti) , which open into a canal network 

 (rete testis) in the mediastinum. From this fifteen to twenty 

 minute tubules (vasa efferentia) run through the tunica albu- 

 ginea and into the globus major, where each twists into a con- 

 ical mass (conus vasculosus) ; they then open into a single 



236] 



