306 Proceedings of the Royal Physical Society. 



The rio'lit luno: was divided into three lobes, and the left 

 into two. 



The heart and great vessels presented no special peculiari- 

 ties. The annulis ovalis was feebly marked, and the modera- 

 tor band in the right ventricle was represented by several 

 bundles of fibres. The innominate and left common carotid 

 arteries arose by a common trunk, otherwise the arrange- 

 ment of the large vessels was the same as in the human 

 subject. 



The inferior mesenteric vein joined the splenic about half 

 an inch from its termination. According to Mr Treves^ this 

 is a feature in the higher development of animals, as in none 

 below monkeys does it end in this way. 



Female Genitals. — Our knowledge of the anatomy of the 

 female genitals in the chimpanzee and the other anthropoid 

 apes is very imperfect, and the few descriptions we have of 

 these organs differ on several points. 



The following account is based upon the examination of 

 the pelvic viscera of two animals — viz., the one described in 

 the previous portion of this paper, and another for which I 

 am indebted to the kindness of Professor D. J. Cunninoham. 

 The former specimen I received, as already mentioned, in a 

 fresh condition. The genitals were examined in situ, and 

 then removed for further dissection. The specimen I re- 

 ceived from Dr Cunningham consisted of the pelvis and 

 lower extremities of a female chimpanzee, which was some- 

 what younger than the one I had previously examined. The 

 pelvic viscera had not been removed. I decided to make a 

 mesial section of this pelvis, and this was done with a large 

 knife after the specimen had been well hardened in spirit. 

 Fig. 2 represents the left half of this section. While readily 

 admitting that this method is not so satisfactory as that of 

 making frozen sections of the entire animal, I believe that 

 the drawing illustrates very accurately the normal relations 

 of the structures at the lower part of the pelvis. It certainly 

 agrees very closely with the results obtained by an examina- 

 tion of the entire animal. It must be remembered that both 

 my specimens were young and sexually immature. 



^ The Anatomy of tlie Intestinal Canal and Peritoneum in Man, 1885, p. 15. 



