iv THE GENERATIVE SYSTEM OF THE MALE 129 



united with the canal of the vesiculae seminales into the 

 ductus ejaculatorius (Figs. 24, 25, and 26). 



Its calibre increases along the testicular portion, then becomes 



Fio. 23. Section through tins epithelium of the canal of the epididymis. Magnified 700 diameters. 

 (Kolliker.) m, connective tissue and muscle fibres ; cb, basal epithelial cells ; cy>, ciliated 

 cells ; g, granules of pigment ; c, cuticular border ; p, cilium. 



Fio. 24. The base of the urinary bladder of man, and its relations to the prostate, the vesiculae 

 seminales, and the vasa deferentia. V, bladder ; U, ureter ; P, prostate ; it, urethra ; vs, 

 vesieula seminalis ; cd, vas deferens ; cd', ampulla of vas deferens ; I, triangle Included 

 between the ampullae of the vasa deferentia and the line of reflection of the peritoneum from 

 the bladder on to the rectum in the vesico-rectal cavity ; p, peritoneum. 



uniform (2-3 mm.), and so remains as far as the lowest part of 

 the pelvic portion, when it becomes fusiform, flattened, and 

 assumes the name of ampulla. Its surface becomes unequal and 

 knobby, due to diverticula with blind ends arranged along the 

 VOL. v K 



