186 DISEASE IN WILD MAMMALS AND BIRDS 
fit. Somewhat later this was repeated in another case, 
but observations where this might be useful are rare. 
The pathology of gastric conditions offers little to 
contrast with that of man. The enormous distensibility 
of the fundal pouch often suggests to the observer the 
rumen of ungulates. Acute gastritis of one kind or 
another and acute catarrhal enteritis are the most com- 
mon lesions noted in the Primates. Involvement of the 
intestine or colon need not carry \dth it an increase of 
signs of illness, although at times one will see an evi- 
dently sick animal with diarrhoea. Anatomically the 
lesions are commonly restricted to the stretches of gut 
above the ileum, it being rather rare that this division or 
the colon is affected. Pathologically the lesions are 
catarrhal mth definite involvement of the follicles in 
about one-third of the cases. In this order toxic and 
pseudomembranous forms are quite rare and ulcerative 
lesions uncommon. Colonic disease as a sequel to inflam- 
mation higher up is sometimes seen in the follicular 
varieties, but takes a minor place compared to amoebic 
dysentery of which we have had several cases; this will 
be discussed under a separate heading. Degenerative 
disease of the skeleton is almost always accompanied by 
a low grade of enteritis but not necessarily gastritis or 
colitis. The pallor of the mucosa, while at times striking, 
may be relieved by follicular spots and petechia or pig- 
mentation. Often, however, animals suffering from 
osteomalacia and rickets come to their end by an acute 
inflammation of the gut tract. 
The bacteriology at our disposal allows no conclusions. 
Aside from a case probably due to Ps. fluorescens and 
one with colon bacillus abscesses in the liver, no reliable 
data are at hand. 
Reference to Table 11 reveals the fact that among 
orders with sufficient autopsies to permit percentages, the 
alimentary tract in monkeys is in the group of low figures, 
that the intestinal section is relatively more often 
