1006 



DR. C. F. SONNTAG ON THE PELVIC MUSCLES 



a trace of the original division of the gland into two parts, and 

 there is a small pyramidal lobe (P.L.). The tissue is dense. 

 When sections are made through it (text-fig. 58 A-33) it is seen 

 how the urethra is not surrounded by prostatic glandular tissue, 

 but is ante-prostatic ; and Milne-Edwards showed how the same 

 ari-angement is present in the Orang-Outan. The ducts of the 

 vesiculfe seminales enter the pi'ostate above and latei-al to the two 

 vasa deferentia. The vasa and seminal ducts unite to form two 

 tubes, Avhich open side by side into the urethra at the proximal 

 end of a broad ridge (text-fig. 58 D.). The mouths of the ducts 

 are thickened. 



Coiuper's Glands (text-fig. 61, C.G.) : — These glands, wliich are 



Text-figure 62. 



/ /^\ \ 



/ / -^W \ 



The rectum (R.) and its relations to the seminal vesicles (V.S.), hnemonhoidal artery 

 (H.A.), and pudendal artery (P.A.) ; CO: coccyx; C.G: Cowper's glands; 

 G.S.S.L : great sciatic ligament ; T.I. and T.L. as in text-iig. 61. 



the size of large peas, are situated as in Man. Well-marked 

 ducts open into the urethra. The glands are not covered by 

 fibres of the bulbo-cavernosus muscles. They are relatively larger 

 in the Chimpanzee and Orang than in Man, The orifices of the 

 ducts are very minvite. 



The bladder has well-marlced lateral ligaments, and the urachus 

 is small, but the anterior ligament is well marked. The anterior 

 wall of the bladder is closely bound down to the pubis below. 

 The mucous membrane is thrown into fine longitudinal folds, 

 quite unlike the greatly corrugated interior which was seen in a 

 female animal. 



