THE MALE GENERATIVE GLANDS. 185 



cells, measuring 0. 01 13 to 0.0142 mm. The peripheral ones 

 present a radiated appearance. In man, their cell bodies 

 may contain a yellowish pigment. A coagulated, originally 

 thick fluid, albuminous substance between the spermatic cells 

 has been erroneously regarded as a second cell-work. 



The connective-tissue frame-work substance of the organ is, 

 as we have previously said, developed from the inner surface 

 of the albuginea and the system of septa. 



In many creatures (man, dog, rabbit) fibrillated connective 

 tissue prevails ; in others (rat, male cat, boar) it is much less 

 developed. In the rabbit the connective-tissue bundles are 

 invested by the first mentioned (Fig. 55, a) forms of cells 

 (the thin, nucleated plates, with protoplasma in the centre, 

 and a hyaline, cortical portion) ; there may even be regular, 

 endothelial cell membranes spread out over the seminiferous 

 canals and the blood-vessels. In the just mentioned second 

 group of animals we find the granular connective-tissue cells 

 (Fig. 55, b) in immense numbers, while in the first division 

 they are more scanty, or are scarcely met with. 



These granular cells (generally rounded or polygonal, rarely 

 having processes, rich in protoplasm, fat, and brownish pig- 

 ment) remind one of the hepatic cell (Fig. 121). They have 

 a strand or column-like arrangement. Very frequently the 

 blood-vessels are here regularly ensheathed by such cell 

 layers, as we have described them (p. 55) in connection with 

 the vicinity of the vessels. 



The blood-vessels (Fig. 163, c) circumvolute the convoluted 

 seminiferous canals in close apposition, with a long-meshed, 

 tolerably wide capillary net-work. We find this net-work 

 more strongly developed and rounded in the epididymis. 

 The latter part, also, probably has a secretory glandular ac- 

 tivity (Mihalkovics). 



Let us consider, finally, the lymph passages (d) ; for the 

 gland tissue is entirely without lymphatic vessels. It was 

 Ludwig and Tomsa who founded our knowledge of this sub- 

 ject. Subsequent investigations, also a trifle of mine, have 

 been added. 



