162 THE TESTES, BY V. LA VALETTE ST. GEORGE. 



VESSELS AND NERVES OF THE TESTIS. The bloodvessels of 

 the testis spring from the arteria spermatica interna, and 

 penetrate the posterior border of the gland, dividing partly in 

 the corpus Highmorianum, and in part upon the surface of 

 the organ, within the substance of and beneath the tunica 

 albuginea. From both parts they enter the gland substance, 

 and form a wide-meshed capillary plexus around the semini- 

 ferous tubules. The distribution of vessels to the epididymis, 

 which is supplied by the arteria deferentialis, is more sparing. 

 The veins behave like the arteries, and run upwards in the 

 posterior part of the albuginea. 



The lymphatics of the testis have lately been very carefully 

 examined by Ludwig and Tomsa * That they were remarkably 

 developed, had already been known from the time of Panizza,-f 

 but their origin remained undiscovered. Ludwig and Tomsa 

 have now, however, shown that the lymphatics of these glands 

 arise from wide passages destitute of proper walls, running be- 

 tween the tubuli seminiferi. His:}: has corroborated these state- 

 ments, and demonstrated by means of silvered preparations that 

 the lymphatic radicles of the testis are lined by a characteristic 

 epithelium. Frey, from the results of his numerous experi- 

 ments with injections, also concurs in these views. Tommasi || 

 treated recent sections of the testes with a 4 per cent, solution 

 of nitrate of silver, and came .to the conclusion that the lymph- 

 atics of the testis terminate in a system of lacunae, in which 

 the tubuli seminiferi are suspended, and that the walls of these 

 lacunae are invested with an epithelium analogous to that of 

 the lymphatics, which also covers the seminiferous tubules. 



KollikerIF assents to the accuracy of these statements. In 

 the Bull he found the diameter of the finest tubules to be from 

 40 to 90 jit, whilst the epithelial cells were from 90 to 110 p 

 in length, and from 10 to 20 jj. in breadth. He, like myself, 



* Wiener Sitzungsberichte, Band xliv., p. 221. 

 t Osservazioni. Pavia, 1836, Tab. viii. 

 + Zeitschrift fur wiss. Zoologie, p. 469. 

 Virchow's Archw, Band xxviii., p. 370. 

 || Virchow's Archiv, Band xxxviii., p. 370. 

 IT Handbuch der Gewebelehre, p. 533. 



