THE GENITAL ORGANS OF THE MALE. 965 



selves like the arteries, aud unite in a single trunk that enters the posterior vena 

 cava, near the renal veins. (On tlie cord, in addition to their sometimes varicose 

 condition, the spermatic veins have been observed to form a network, named 

 the pampiniform plexus.) 



The lymphatics are most numerous beneath the serous layer aud the tunica 



Fig. 520. 



THE INTERNAL GENITO-URINAKY ORGANS, WITH THE STOMACH, LIVER, AND SPLEEN, IN 

 THE FCETUS OF A MARE 



i?, Left kidney ; V, bladder ; T, testicle ; at, spermatic artery ; G, gubernaculura testis ; e, 

 epididymis (the letter is placed in the centre of the serous layer which suspends the testicle and 

 spermatic vessels from the suldumbar region, and after the descent of the gland, forms the 

 fr;enum between the two layers in the vaginal sheath); E, stomach; F, liver; /, lobus Spigelii; 

 P, vena port?e ; C, umbilical cord; 0, umbilical vein; 0', intra-hepatic course of that vein, 

 indicated by a double dotted line. 



albuginea. They commence by lacunae in the interstitial connective tissue, and 

 form a very rich network, in the meshes of which are seminiferous tubules. They 

 pass into the network of the tunica albuginea, and thence they follow the sper- 

 matic cord to terminate in the sublumbar glands. 



The nerves of the testicle are derived from the sympathetic (and pass from 



