6G8 



ANATOMY OF VERTEBRATES. 



prostates, b, b, have each a small central cavity; whence the 

 duct is continued to terminate near the sperm-duct, in an oblong 

 depression by the side of the verumontanum : on a small fold of 



525 



526 



Testes, prostates and protometra, Gnat, ccxxxix". 



this part is the orifice of the protometra which is continued, at 

 c, between the dilated sperm-ducts, closely 

 attached thereto by areolar tissue ; then di- 

 viding into two horns diverging and closely 

 apposed to the sperm-ducts, «, a, as far as 

 the epididymis, in which they are lost. The 

 Cowperian glands, two on each side, open 

 upon the margin of a fold at the bulb of the 

 urethra. The prostatic glands in the Deer, 

 fig. 526, b, b, are more slender in propor- 

 tion to their length than in the Goat. The 

 protometra, c, is reduced to a hardly dis- 

 tinguishable trace ; and its cavity, which 

 exists in the embryo, is obliterated at 

 birth. 



In the Bull the narrow elongate prostates 

 are irregularly contorted. The ' erectores ' 

 and ' acceleratores ' are powerful muscles. 

 The slender i retractores ' arise from the 

 anterior commissure of the sphincter ani. 

 There are preputial follicles in most Rumi- 

 nants, especially the Antelopes ; but only in 

 the Muskdeer do they attain the size and structure described in 

 the preceding chapter. In no hoofed Mammal is there an <os penis.' 

 § 379. In Carnivora. — The outward indications of the male sex 



Prostates and protometra, Deer 

 ccxxxix". 



