MALE OKGANS OF INSECTIVORES. 



655 



fig. 511, C, is considerable 1 : the globus major of the epididymis 

 lies in the cremasteric pouch, which is inverted when the reduced 

 testis returns into the abdomen. The vasa deferentia, ib. /, receive 

 at their termination the secre- 

 tion of the small glands with 

 a granulated exterior, e : the 

 • vesicular glands,' ib. a, a, are 

 large, lobulate, and exude a 

 hardish cheese-like secretion. 

 The prostatic glands, b, c, are 

 masses of slender subconvolute 

 tubes. The Cowperian glands, 

 of the usual compact form, lie 

 one on each side of the rectum 

 and send their long ducts to the 

 large ' foramen caecum ' at the 

 urethral bulb. The penis has 

 its ( levator ' muscle and ossi- 

 cle : the prepuce is served by a 

 pair of glands secreting a whitish 

 mucus. 



The spermatozoa of the Mu- 

 ridce have the f body ' shaped 

 like the bent blade of a knife, 

 when viewed in profile, fig. 

 512, a, B ; the vibratile 'tail' is very long: in the Squirrel (fig. 

 513) the body is lamelliform, with the surfaces subbiconcave, and 

 the margin thickened an- 511 



teriorly : the e tail ' is of 

 moderate length. It is rela- 

 tively shorter to the body in 

 the Guinea-pig, fig. 514,rf: 

 in this figure a portion of a 

 tubule of the testis is mag- 

 nified 300 diameters, show- 

 ing the basilemma a, «, its 

 lining (precipitate) of nucle- 

 ate corpuscles and granules, 

 b : with the developed nu- 

 clei of detached cells, form- 

 ing the spermatozoa, a. 



§ 372. In Insectivora. — The periodical enlargement and 



Male organs, Water-vole. cxxn'. 



/A 



Male organs, Rat. 



1 As in birds ; see vol. ii. p. 243, and xx. vol. iv. p 79. 



