484 DISEASE IN WILD MAMMALS AND BIRDS 
Perhaps they do not offer a perfect cross section of 
zoological distribution of tuberculosis because of the pre- 
dominance in the display of birds, of monkeys and of 
ungulates, but the tigures will be found significant in cer- 
tain respects. Such records cannot be compared with 
those obtained for domesticated animals in farms or 
breeding places, nor can our material be used to show 
the incidence for individual species, such as cows, dogs 
and the like, in a manner commonly used in veterinary 
literature. Those who are interested in this phase of the 
problem can find in Lubarsch-Ostertag's Ergehnisse, 
1917-18, No. 2, a summary by Eber of all recent literature, 
covering nearly 1,700 references, which really amounts to 
a review of all modern knowledge of tuberculosis in the 
lower animals. The article does not, however, attempt 
to compare or contrast the incidence per order or family 
in wild varieties since little information is available on 
these points. There are no reliable data concerning the 
existence of tuberculosis in the wild. It is noted in the 
report of the British Tuberculosis Commission that 
monkeys were received with this disease ; Eber mentions 
that wild swine from a private preserve presented 
undoubted evidence of tuberculosis and another similar 
experience with pheasants, but these and other citations 
can give no proper estimate of exact conditions nor allow 
a decision that the infection exists at all under natural 
environment for in all cases the association with human 
beings or domesticated animals cannot be excluded. 
Tuberculosis is usually described as a disease of 
civilization and its incidence surely varies directly 
with crowding. 
The Table. 
Description of Table 23. The study of our autopsy 
records was begun by the preparation of the accompany- 
ing table, which is based first upon the zoological classifi- 
cation per order with subdivisions for families where 
