Eben C. Hill 453 
the comparative positions of the spermatic cords is shown in figures 
6, 7% and 8. In the illustration showing the testis of the human 
embryo, the arteries are found to encircle the gland, being distributed 
to the under surface of the albuginea. Frequent anastomoses are formed 
similar in many ways to the adult superficial supply in the mouse, but 
differing materially from the arterial distribution in the capsule of the 
pig testis. The relative position of the spermatic cord to the epididymis 
is quite noticeable and may be due to the differences in the manner of 
suspension of the gland with reference to the horizontal plane of the 
body. The comparative size of the globus 
major and minor is also markedly differ- 
ent. In the pig the globus minor is at 
times as large and not infrequently larger 
than the globus major. Few convolutions 
are apparent in the human embryonic 
gland, while in the testis of the embryo 
mouse as well as in the adult a certain 
amount of tortuosity is met with, not, how- 
ever, anywhere near as marked as in the 
pig. 
Arterial and Venous Supply of the 
Adult Testis of the Pig—rThe capsular 
artery gives off on the internal surface of 
the Tunica albuginea at rather regular in- 
tervals tortuous rib-like branches which + 
nearly encircle the gland. These branches Fic. 8. The capsular dis- 
penetrate the substance of the gland follow- eee ee oF Lou poe 
ing the septa and entering perpendicularly adult mouse. xX 3%. This 
till they reach the mediastinum. Except in eeoianal eee ips peers 
a very few instances no branches are tive positions of the cords 
given off from these perpendicular arteries ieee HOES NET 1a 
until after the abrupt retro-flexion occurs 
near the center of the gland. After this sudden backward bending, 
many branches are given off which, coursing toward the surface of 
the testis, send off smaller twigs which in turn divide into capillaries 
around the seminiferous tubules and supply the stroma of the gland. 
The veins collect from these capillaries and merging into larger vessels 
follow the septa directly toward the albuginea where passing under the 
arteries on the internal surface of the tunica albuginea, they encircle 
the gland and passing toward the epididymis form the pampiniform 
