MALE REPRODUCTIVE ORGANS 329 



masculinus, just in front of its communication 

 with the urino-genital canal, and opposite the 

 hinder end of the obturator foramen. 



Slit up the uterus masculinus along one side with scissors. 

 Note the large aperture leading into the urino-genital canal, 

 and, just in front of this, the small paired openings of the 

 vasa deferentia. 



i. The prostate is a series of glandular masses, placed 

 around the dorsal surface and sides of the uterus 

 masculinus and vasa deferentia, and opening by 

 short ducts iato the urino-genital canal. There 

 are four or five lobes, the largest of which is an 

 anterior lobe, closely appUed to the dorsal wall of 

 the uterus masculinus, and bilobed in front : 

 behind this is a smaller posterior lobe, sometimes 

 divided into two : a pair of still smaller lateral 

 lobes lie in the angle between the vasa deferentia 

 and the uterus masculinus. 



k. Cowper's glands are a pair of glandular bodies, 

 varying greatly in size, and placed on the dorsal 

 wall of the urino-genital canal, behind the 

 prostate. 



1. The rectum is a white tube, with rather thick 

 muscular walls, lying dorsal to the urino-genital 

 organs, and close to the ventral surface of the 

 sacrum. 



m. The perinseal glands are a pair of elongated glan- 

 dular bodies, dark in colour, and about three- 

 quarters of an inch long. They lie at the sides of 

 the penis, and in the anterior walls of the perinseal 

 sacs, into which their ducts open. 



n. The rectal glands are a pair of pale yellowish 

 bodies, much larger than the perinseal glands, and 

 lying along the sides and posterior surface of the 

 last two inches of the rectum. 



Slit up with scissors the urino-genital canal along its 

 ivhole length, in the mid-ventral line. 



