SECT. I98.] VESSELS AND NERVES OF THE TESTIS. 437 



external skin : this is here characterised by its thinness, the 

 absence of fat, the colour of its epidermis, and the large size of 

 its sebaceous and sudoriparous glands. 



The blood-vessels of the testicle and epididymis are derived 

 from the long and slender internal spermatic artery, which runs in 

 the spermatic cord, and proceeds from its posterior border to the 

 testicle. Arrived here, some branches of the artery penetrate at 

 once into the corpus Ilighmorianum, while others split up into 

 numerous tortuous twigs, which pass along the inner surface of 

 the tunica albuginea and in its substance, in their course towards 

 the anterior border of the testicle. The coarser ramification in the 

 parenchyma of the testicle proceeds in part from the corpus High- 

 moriamun, in part from the tunica albuginea along the septula 

 testis. From these sources, numerous small vessels pass into the 

 interior of the lobules, and form a wide net-work of capillaries, 

 O'ooj'" to 0-008'" in width, around the seminal tubules. On the 

 epididymis, a similar net-work, but more scanty, is met with, and 

 in the formation of this, the art. deferentialis, is also concerned. 

 The scrotum, on the other hand, and the vaginal tunics, are richly 

 supplied with vessels by the scrotal and external spermatic arteries. 

 The veins are but a repetition of the arteries, and as for the 

 lymphatics, they are very numerous in the scrotum, and in the 

 vaginal tunics, and, according to the beautiful investigations of 

 Panizza (Osservazioni, tab. viii.), confirmed by Arnold, the lym- 

 phatics of the testicle itself are also very fully developed. They come 

 partly from the interior, partly from the surface of the testicle and 

 epididymis, form beautiful net-works beneath the tunica adnata, 

 aud finally lead to the lumbar glands bv means of several trunklets, 

 which are situated in the spermatic cord, and connected with those 

 of the vaginal tunics. 



The nerves of the testicle are but scanty, and arise from the 

 internal spermatic plexus. They accompany the arteries to the 

 testicle, but their course in the interior 1 have in vain endeavoured 

 to investigate, as it is rare to see dark-bordered nerve-fibres, even 

 along with the larger arteries of the parenchyma. 



Bundles of muscular fibres, like those described by me in the iuner mus- 

 cular coat of the testicle, occur, also, according to Iiou/jet, in the tunica albu- 

 ginea, and even in the septula testis. The so-called hydatids of Morgagni on 

 the head of the epididymis have been examined by 0. Becker, who finds that 

 they always contain ciliated epithelium, not only when they have a connection 

 with the seminal tubules of the epididymis, but even when they are entirely 

 closed. 



