508 ON GELADA RUEPPELLI. 
wards, 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 In Gelada, Cercopithecus, and Macacus it is obsolete.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 Oynocephalus 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 mext in size, elongate and triangular. The 
obliquely cut upper lobe is smaller than the subquadrate largest lower 
lobe. 
There are three circumvallate papille at the base of the tongue, 
arranged in the eharacteristie V. 
The following are intestinal measurements :— 
Male. Female. 
inches. inches. 
‘Small intestine............ 90 129 
Large intestine..........:. 58 51 
CeeGuiti "Sas ck we betes 3 3 
The stomach much resembles that of man in shape, being a little 
more elongate. There is no appendix vermiformis to the sacculated 
cecum, 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 
suboblong and slightly bifid at one extremity. 
The kidneys are ovate, not reniform, and with but a single pyramid 
in each. 
There is an os penis three quarters of an inch long. The vagina is 
very hirsute, with large broad transverse ruge. 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 
