THE COMMUNICABLE DISEASES 495 
with pulmonary disease. Tuberculous peritonitis of the 
plastic and nodular variety occurred only six times, 
though light adhesions to nodules in the liver and spleen 
were quite common. Pericarditis was found five times, 
in three of which there was myocardial disease ; which of 
the two was primary was not indicated in the notes but 
from present reading it would seem that the heart muscle 
was involved first. 
The next order, Lemures, has a susceptibility of about 
half that of the monkeys judging by the percentage inci- 
dence. Analytically the members of this group react quite 
like the preceding order in having the same types of 
origin, pathology and organic distribution. Since they 
are so close zoologically, present similar lesions and are 
tested in the same manner as the monkeys, we group them 
together and shall proceed to discuss special cases of 
interest in both orders. 
Special Cases in Primates and Lemures. Acute gen- 
eral miliary tuberculosis occurred thrice in Old World 
and once in New World monkeys. The first case took its 
origin in a caseous gland in the bronchotracheal area, 
the lung showing a minor degree of involvement with 
milia but no older process. The second took its origin in 
the mesenteric area and the organs of this section of the 
body were most affected. The only case in the Cebidae 
seemed to be of intestinal origin since an acute plastic 
peritonitis with fluid exudate accompanied the generally 
miliary disease. 
Pearl disease of the bovine type has been encountered 
on four occasions but it cannot be said to have developed 
to the state of perfection seen in the cow. There is lack- 
ing the masses of nodules growing together in a fungoid 
character usually seen on the pleura and peritoneum. The 
monkey form is in isolated nodules of gray yellow color 
which may show caseous centres. The visceral lesions 
are in firm separate areas not tending to soften or coa- 
lesce. Two of these monkeys died from recent pulmonary 
