

MALE REPRODUCTIVE SYSTEM. 367 



g. The uterus masculinus is a large median sac, 

 slightly bilobed in front, attached to the dorsal 

 surface of the urino-genital canal, into which it 

 opens, and extending forwards along the dorsal 

 surface of the bladder to about the middle of its 

 length. 



Note. The mature rat and cavy have large seminal vesicles 

 which are not present as such in the rabbit. 



h. The posterior ends of the vasa deferentia are 



slightly dilated, and run back, side by side, along 

 the dorsal surface of the neck of the bladder, 

 between it and the uterus masculinus. They 

 open separately into the ventral wall of the uterus 

 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, grouped 

 around the dorsal surface and sides of the uterus 

 masculinus and vasa deferentia, and opening by 

 short ducts into the urino-genital canal. There 

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

 anterior lobe, closely applied 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 dor- 

 sal wall of the urino-genital canal, behind the 

 prostate. 



