454 PROF. A. H. GARROD ON GELADA RUEPPELLI. [May 20, 



In Macacus and Cynocephalus the anterior palatine foramina 

 open into an osseous depression, which is continued for some 

 distance fowards, almost to the alveolar margin. In Gelada they 

 open directly upon the surface of the palate. 



In Macacus and in Cercopithecus a powerful transverse ridge of 

 bone is seen to form the posterior boundary of the osseous palate. 

 This is not seen in Gelada or in Cynocephalus. 



In Cynocephalus the mastoid process of the temporal bone is 

 fairly developed. In Gelada, Cercopithecus, and Macacus it is 

 obsolete. 



In Cynocephalus and Macacus the hamular process of the internal 

 pterygoid plate of the sphenoid bone is much more superficial, and 

 is placed more forward than in Gelada. 



The left lung is two-lobed, the lower being slightly the larger. 

 The upper is nearly divided transversely into two moieties, of which 

 the lower is a little the smaller. 



The right lung has four lobes, the (bifid) azygos being the 

 smallest, the middle next in size, elongate and triangular. The ob- 

 liquely cut upper lobe is smaller than the subquadrate largest lower 

 lobe. 



There are three circumvallate papilla? at the base of the tongue, 

 arranged in the characteristic V. 



The following are intestinal measurements : — - 



Small intestine 



Large intestine 



Caecum 



The stomach much resembles that of man in shape, being a little 

 more elongate. There is no appendix vermiformis to the sacculated 

 caecum, which does not differ from that of the lower Old- World 

 Monkeys. The colon is sacculated throughout. 



The spleen is three inches long, one and a half inch broad, being 

 subobloug and slightly bifid at one extremity. 



The kidneys are ovate, not reniform, and with but a single pyra- 

 mid in each. 



There is an os penis three quarters of an inch long. The 

 vagina is very hirsute, with large broad transverse rugae. The uterus 

 is pyriform. 



To understand the bearing of the details of the anatomy of the 

 liver of the Gelada, it will be necessary to view the peculiarities of 

 the organ in allied genera. This the inspection of a large number 

 of species enables me to do. 



In the genus Macacus the liver is comparatively uncomplicated. 

 The right and left lateral fissures are well marked, the umbilical 

 fissure being less considerable and less constant in depth. The 

 abdominal surfaces of the right and left central lobes are frequently 



