AND GENP:RATIVE organs in the male CniMrANZEE. 



1005 



inwards towards the prostate gland. They conceal the back of 

 the bladder and extend upwards along the rectum (text-fig. 62, E,.). 

 Each consists of a long, coiled tube with no saccular dilatations. 

 The same arrangement is present in the Orang and in the 

 Cebid.ie, whereas Man has many glands and a short tube. 

 Leuckart (5) pointed out that the length of the tube is inversely 

 proportional to the importance of the diverticula, so the vesiculse 

 are impoi-tant secreting organs in Man. The gland has few 

 ducts but an enormous number of lobules in Mandrillus (10) 

 and some other Cercopithecida;. The ttibes in the Chimpanzee 

 contain milky fluid. Thus the vesicles show the following 

 variations : — 



1. Tubes small, lobules numerous — Homo, Cercopithecidfe. 



2. Tubes long, no lobules — Simia, Anthropojyithecus, Cehus. 



Text-figure 61. 



The internal generative organs of tlie Chimpanzee. B : bulb of urethra ; CAP : 

 prostatic capsule laid back ; C.L.A : cut edge of levator ani ; C.S : corpus 

 spongiosum; T.I: tuber iscliii; T.L : triangular ligament; U: urethra. 

 Other letters in text. 



T'he prostate (text-fig. 61, P.G.) is of moderate size, and pj'ra- 

 midal in shape with a rounded apex. In a Chimpanzee whose 

 bodily length is 47 inches, the prostate is "8 inch long and 

 •^5 inch wide across the base. It has a well-marked capsule 

 derived from the pelvic fascia, and its relations to the neighbour- 

 ing structures in the pelvis are as in Man. A furrow represents 



