AND GENERATIVE ORGANS IN THE MALE CHIMPANZEE. 1003 



The testicle (text-figs. 59 and 60) is relatively larger tlia'n in 

 Man. In an animal 47 inches long from the crown to the heels, 

 tlie testis is 2-3 inches long, V7 inches wide, and 1 inch thick. 

 The line of attachment of the tunica vaginalis (L.T.V.) runs 

 obliquely across the epididymis (EPID). The upper pole is full 

 and rounded, and a well-marked i^ecess (S.E.R.) lies between it 

 and the overhanging globus major (G.Ma.) of the epididymis. 

 The lower pole is not so massive as the upper pole. The epididymis 

 is a long, narrow body, whose ends are folded inwards towards 

 one another. The flexures constitute the globus major (G.Ma.) 

 and globus minor (G.Mi.). The middle part is straight. On 

 section the testis is seen to have a thick tunica albuginea (T.AL.) 

 with blood-vessels, which are very tortuous. Trabeculre pass 

 inwards between the tunica albuginea and the corpus Highmori- 

 anum (C.H.), which is a large mass of connective tissue with 

 seminal ducts and large blood-vessels. The corpus is relatively 



Text-fisfure 59. 



HYDATID- 



L.T.V. 



ANTERIOR VIEW 



MESIAL VIEW 



- G.Mi:. 



LATERAL VIEW 

 External appearances of the testis. Letters in text. 



larger than in Man. '.Plie trn.beculaj bound well-marked loculi, in 

 which the brownish-yellow seminiferous tubes lie. The traljecnlse 

 also form guides for blood-vessels. The elements of the duct 

 apparatus are as in Man. Thus there appear in succession the 

 seminiferous tubules, vasa recta, rete testis in the corpus High- 

 morianum, vasa efFerentia, coni vasculosi, and the canal of the 

 epididymis. The epididymis is loosely bound to the testis. At 

 the upper pole of the testis a hydatid occurs. 



The testis of the Gibbon (text-fig. 60 B) presents a totally 

 different picture from that in the Chimpanzee. A deep fissure 

 divides the organ into two. No corpus llighmorianum is seen, 

 and the surface appears divided by maiiy small sulci into 

 numerous lobules, which are granular. No marked trabeculae are 

 present in the sulci between the lobules. The internal fissure 

 corresponds to an external fissure. 



