THE MALE GENITAL ORGANS. 



857 



In all species, the descent of the testicle commences before birth : in tbe 

 BovidsB it is even achieved in the early months of intra-uterine existence. 

 In Solipeds, however, the testicle most frequently remains in the inguinal 

 canal until the animal is from six to ten months old. 



Fig. 339. 



niE INTEENAL GENITO-UBINARY ORGANS, WrTH THE STOMACH, LIVEE, AND SPLEEN, 

 IN THE FffiTUS OF A MAEE. 

 P. Left kidney; v, Bladder; T, Testicle; at, Spermatic artery; G, Gnbernaoulnm 

 testis ■ e Epididymis— the letter is placed in the centre of the serous layer whi(^ 

 suspends the testicle and spermatic ressels from the sublumbar region, and after 

 the descent of the gland, forms the fra;num between the two layers in the vaginal 

 sheath; E, Stomach; E, Liver; /, Lobus Spigelii; P, Vena porta;; c Umbilical 

 cord ; o, Umbilical vein ; o'. Intrahepatic course of that vein, indicated by a double 

 dotted line. 



Ftjnction.— The testicles secrete the spermatic (or seminal) fluid. Pure 

 semen such as is derived from these glands, is a white, viscid, odorless, 



