. The anatomical record. Anatomy; Anatomy. :^2iJ The Anatomical Eecord Feb. 29, '08. may be no longer reason to think that there is any organic connection between the cells and the vessels, it is certain that the cells have a very generous blood-supply and a close spatial relation to the arterioles of the seminal tubules. Since the small branches of the spermatic artery, entering from the albuginea and the interlobular septa, must traverse the intertubular spaces which are largely occupied by the interstitial cells, it is clear that the collections of these cells will be pierced by the arterio
. The anatomical record. Anatomy; Anatomy. :^2iJ The Anatomical Eecord Feb. 29, '08. may be no longer reason to think that there is any organic connection between the cells and the vessels, it is certain that the cells have a very generous blood-supply and a close spatial relation to the arterioles of the seminal tubules. Since the small branches of the spermatic artery, entering from the albuginea and the interlobular septa, must traverse the intertubular spaces which are largely occupied by the interstitial cells, it is clear that the collections of these cells will be pierced by the arterioles on their way to the tubules. Such vessels, however, are usually well separated from the cells by the accompanying connective tissue, and have no particular relation to the cells except that of space. They give off capillaries, however, which do come into very inti- mate relation with the cells. Fig. 5 shows such a capillary. The capil- laries, after euterino- the collections of cells, often divide, usuallv dichot-. Fig. 6 Fig. 7 Fig. G. Collections of interstitial fells from among the tubuli recti of the cat's testis. X about 500. Fig. 7. A group of interstitial cells from the squirrel's testis. The con- nective tissue is reduced to a fine reticulum running among the cells at irregular intervals. The group rests upon a cai)illary. X about 500. omously, to form a capillary network, and are separated from the cells only by the framework of the latter. The clear spaces around the capil- laries are possibly the beginnings of lymphatics. Many of the capillaries do not terminate among the intei'stitial cells, but proceed through them to join the vascular network on the walls of the tubules. THE HISTOLOGY OF THE IXDIVIDUAL CKLLS. It is probable that there is a fairly typical conformation of Leydig^s cells in all mammals. It seems to have been noted first by Plato in the cat, and was also found by v. Lenhossek in man; while the writer observed it through all the later stages of the
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