1864.| PROF. HUXLEY ON ARCTOCEBUS CALABARENSIS, 329 
The stomach (fig. 8) is 13 inch long and about 1 inch in ver- 
tical diameter. The cesophagus opens on the pyloric side of the 
centre of its lesser curvature ; the cardiac division of the stomach is 
consequently very large, and indeed larger than the pyloric division. 
At the pylorus there is no complete valve, but merely a constriction, 
which leaves a wide passage of communication between the stomach 
and the duodenum. The wall of the pyloric division is rather 
thicker than that of the cardiac end, in which the mucous membrane 
is raised into irregular longitudinal folds. 
The small intestine remains of nearly the same width (about 0°4 
inch) throughout ; from the pylorus to its junction with the colon it 
is 26 inches long. 
The large intestine, about 0°7 inch wide, is devoid of longitudinal 
muscular bands or sacculations, nor is it divided definitely into colon 
and rectum ; it is 14 inches long. 
As the gullet and oral cavity are 5 inches long, the alimentary 
canal is altogether (5+ 13+26+14)=463 inches long; or a little 
more than four and a half times as long as the body. 
In the Potto the proportion is as 6 or 6°5 to 1; in Stenops java- 
nicus 3°5 to 1; in Stenops gracilis 4 tol; in Otolienus peli 4°9 to 1. 
(See Van der Hoeven, ‘ Potto van Bosman,’ p. 52.) 
Where the large and small intestines join, the caecum is given off. 
This is cylindroidal, somewhat curved, and 23 inches long by 0°9 inch 
in diameter. It has no vermiform appendix (fig. 9). 
Fig. 9. 
The ileum (J/), colon (Co), and cecum (Ca) of the Angwantibo. Nat. size. 
The liver (fig. 10) is a very irregularly shaped body, which, if 
spread out ona flat surface, nearly covers an area 2°2 inches wide by 
1°85 inch long. It is broken up into numerous lobules by radiating 
