620 SPECIAL HISTOLOGY. 



255 li) ; but besides this, there are numerous lamellar processes (septula 

 testis) (Fig. 255 s) arising from the internal surface of the tunica albu- 

 ginea, composed of more lax connective tissue, which, separating the 

 divisions of the glandular structure from each other, and conveying the 

 vessels belonging to them, converge from all sides towards the corpus High- 

 mori, and are attached by their acuminate terminations to its surfaces. 

 The glandular substance of the testis is not absolutely homogeneous, 

 but consists of a certain number (100-250) of pyriform lobules, lobuli 

 testis, which are not, however, everywhere wholly separated from each 

 other, and all converge with their points towards the corpus Highmo- 

 rianum, close to which they are shortest, whilst those between the 

 borders of the organ are the longest (Fig. 255 ??, 257 b). Each of these 

 lobules is formed of from 1 to 3 seminal tubules or canaliculi, 1-8-1-15 

 of a line in diameter. These tubules, much convoluted, pretty frequently 

 dividing and also, perhaps, anastomosing, in their course, form a com- 

 pact substance and ultimately terminate at the thick end of the lobule, 

 at a greater or less distance from the surface, either in csecal ends or in 

 loops (Fig. 256 g). The spermatic canals of each particular lobule, 

 although joined to each other by some connective tissue and vessels, may 

 nevertheless, by careful dissection, be separated to a great extent, or 

 even wholly isolated. Their length, according to Lauth, is from 13 to 

 33 inches. At the pointed extremity of each lobule the spermatic canals 

 become straighter, when each by itself, or the two or three arising in 

 one lobule united into a simple canal, enter as the ductuli recti, 1-10 of 

 a line in diameter (Fig. 257 c), the base of the corpus Higlimori, where 

 they form a very close plexus, 2-3 lines broad and 1J lines thick, and 

 extending the whole length of that body, the rete testis (r. vasculosum 

 Halleri) (Fig. 257 d). From the upper end of this plexus, the canals in 

 which measure from 1-12 to 1-33 of a line (0-03-0-08 of a line), proceed 

 7-15 efferent canals, vasa efferentia testis s. Grraafiana, of -J-J of a line 

 (0-16-0-18 of a line) (Fig. 257 e), which, traversing the t. albuginea, are 

 continued into the epididymis. Here they contract to 1-8 and 1-10 of 

 a line, are convoluted in exactly the same way as the spermatic canals 

 in the lobuli testis, but without presenting divisions or anastomoses, and 

 thus produce a certain number of conical bodies, the apices of which are 

 directed towards the testis, the spermatic cones (coni vasculosi s. cor- 

 pora pyramidalid) (Fig. 257 /). These cones, united together by con- 

 nective tissue, constitute the head (globus major) of the epididymis, at 

 the upper and posterior border of which their canals gradually coalesce; 

 and thus is formed the simple thick duct of the epididymis, 0-16-0-2 of 

 a line in diameter (Fig. 257, g). This duct, convoluted in a well-known 

 manner, forms the body and tail (globus minor) of the epididymis^ 

 usually giving off at its inferior extremity a csecal prolongation, vas 

 aberrans Halleri (Fig. 257, i) and is ultimately continuous with the 



