NEOPLASMS 463 
meagre that they would not combine readily with our 
records. Plimmer, Seligmann, and Murray have pub- 
lished in the Proceedings of the London Zoological 
Society since 1903, their annual report of the pathological 
service in which they have recorded very many interest- 
ing tumors. So too from time to time Harlow Brooks 
and W. R. Blair in the Annual Report of the New York 
ZoologicoJ Park, have presented cases occurring in their 
ser\'ice. Joest (2) discusses tumors in the lower animals 
in a broad Avay and analyzes their incidence and 
characters. G. Y. White and I (3) have already published 
articles on this subject. Numerous single references may 
be found in the Jahresher. der Veterindr-Medicin. 
In so far as the incidence of tumors in wild animals is 
concerned this literature can scarcely give an adequate 
measurement but it would seem that they are less than 
in domestic varieties. Exact figures for the occurrence 
of tumors in the latter seem not available in the literature, 
but one can find that in the Prussian army horses about 
one hundred are observed each year. In our 5,365 speci- 
mens collected during nineteen years, 94 tumors in 92 
animals have been found, 1.7 per cent, or about one in 
every sixty specimens, not at all a low figure. If one were 
to include all fibromata of the feet and the blood collec- 
tions to which the name angioma might be applied, this 
incidence would be greater; they are excluded because 
few in number and vague in history; only one true 
angioma was seen. 
The gross and microscopical appearances of tumors in 
the lower animals are essentially the same as one 
encounters in human beings or at least it is possible to 
apply the pathological nomenclature used in human 
medicine to all the neoplasms we have discovered. There 
is appended a list of all the animals and their tumors, a 
table of zoological orders, tumors and organs (Table 21) 
and an analytical table of the histological data. (Table 22) 
(2) Zeitch. fiir Krehsforsch, Vol. 15, p. 1. 
(.3) Proceed. Phila. Path. 8oc., 1910, and Journal of Pathology and 
Bacteriology, Vol. XVII, 1912. 
