HISTOLOGY 



139 



close proximity and dorsal to the neck of the ampulla. According to 

 Dissclhorst (28), the ducts of the vesicular gland and ductus deferens (neck 

 of ampulla) join to form the ejaculatory duct before entering the urethra. 

 In six animals examined by us the neck of the ampulla and the duct of the 

 vesicular gland entered separately. However, variations exist and in a 

 seventh animal the two ducts joined on the right side but entered separately 



AmpuUary gland Ductus deferens Ampulla 



Vesicular gland 



Dorsal prostate 



Duct of dorsal prostate 



Striated muscle 



Duct of vesicular gland 



Duct of coagulating gland 



Neck of bladder 



CoUiculus seminalis 



Urethral glands 



Urethra 



Ventral prostate Bladder 



Fig. 67. — Cephalic end of the male urethra. A composite drawing of three adjacent 



sagittal sections. (X13.) 



on the left side. The entrance of the neck of the ampulla and vesicular 

 gland form a caudally diminishing elevation on the dorsal wall of the urethra, 

 the colliculus seminalis. 



AmpuUary glands. — The ampullary glands are groups of branched 

 tubular glands which open into the vestibular part of the ampulla. They 

 are lined by low columnar cells having large oval nuclei. The lamina 

 propria is very thin and the mucous membrane is thrown into many delicate, 

 deep, longitudinal folds. The tubules are surrounded by a very thin laver 



