MALE ORGANS OF CETACEA. 



657 



extends round two-thirds the circumference of the testis. The 

 terminal half of the sperm-duct is dilated, like a uterine horn. 



In a proboscis-shrew (Rhynchocyon) the testes, fig. 515, t, have 

 a long epididjmis, e, terminating in the usual convoluted vas 



5U 515 



t 



a 



a 





A portion of a tubule of the testis, Guinea-pig, with sperm-cells 

 and spermatozoa, ccxc. Magnified 300 diameters. 



deferens, d : large conglomerate vesicular 

 and prostatic glands, p, p, extend along 

 the upper half of the elongate muscular 

 part of the urethra : a pair of small Cow- 

 perian glands, e, e, open into the bulbous 

 part : this is grasped by a strong f acce- 

 lerator,' b, b. Above the ' crura corporis 

 cavernosi ' are the 'levatores penis,' k, k. 

 The glans is nearly half the length of the 

 penis ; its termination is suddenly attenu- 

 ated, with a crenate border and a fila- 

 mentary appendage : there is no ossicle 

 in this or other shrews. 



In the Bats the prepuce is relatively 

 longer in its freely projecting part than in 

 Moles and Shrews, and the penis is pen- 

 dulous. The glans offers odd modifications 

 in some species : a lateral pair of promi- 

 nences extend its upper surface in Ves- 

 per tilio scrotinus, the lower surface being 

 carinate and produced into a hirsute point 

 upon which the urethra opens. In Galeo- 

 pithecus the glans shows two lateral longi- 

 tudinal prominences which do not extend 

 to the pointed urethral termination. There 

 is an ossiculum penis iuPteropus: these fur- 

 givorous bats have large vesicular glands. Male orgaus> **""**' Lxxxn " 



O O O 



373. In Bruta. A long epididymis characterises the testicle 

 VOL. in. u u 



