THE PERINEUM, MALE. 415 



the g-lans. (See dissection, page 440.) It is a heart- 

 shaped enlargement, which spreads out laterally and back- 

 ward beyond the crura, which terminate within it. The 

 margin of the glans is called the corona g-landis, and the 

 constricted portion behind it the neck of the penis. The 

 glans shows a vertical slit at its extreme end, the external 

 "urinary meatus. The posterior dilatation is named the 

 bulb. It is about one and one-half inches long, and pro- 

 jects a little beyond the membranous urethra, which enters 

 this portion of the corpus spongiosum. The bulb lies upon 

 (really below) the anterior triangular ligament, being sur- 

 rounded by the accelerator urinae muscle and covered by 

 the perineal fascia. 



The portion of the corpus spongiosum between the glans 

 and bulb is called the body. Through its centre the ure- 

 thra passes, the space between the urethra and sheath of 

 the corpus being filled with erectile tissue. The corpora 

 cavernosa and the corpus spongiosum are bound together 

 by the elastic fascial sheath of the penis, which extends 

 from the root of the penis to the glans. Within this elastic 

 sheath are found the deep dorsal nerves, arteries, and 

 vein of the penis, while external to it are the superficial 

 dorsal vessels and nerves. The former arteries and nerves 

 are from the internal pudic artery and nerve ; the vein emp- 

 ties into the prostatic sinus plexus. The latter vessels are 

 from the external superficial and deep pudic arteries ; the 

 veins open into their vense comites, and the nerves are 

 branches of the iliohypogastric. See page 440. 



Beneath the skin and external to the fibrous sheath lies 

 a membranous layer composed of fibrous and muscular 

 tissue the dartos which is continuous with the similar 

 layer of the scrotum and the fascia of Scarpa. See pages 

 404,438. 



