22 
Amyloid Disease. 
This disease, fairly common in man, has come only 
sporadically to the autopsy table at the Garden in past 
years. This year two cases are noted, i. e., in the liver, 
kidney and spleen of a black-backed piping crow (No. 
5006) and in the liver of a gray-headed lovebird (No. 
4972). The striking feature in all of the animals has 
been the lack of the two commonest aetiologic factors 
of human amyloid disease, i. e., tuberculosis and chronic 
suppurative conditions. 
Dr. Corson-White's Work. 
To Dr. E. P. Corson- White belongs the credit of bearing 
the burden of the routine autopsy work for the past year 
which furnishes the basis of the greater part of this report. 
She has in addition been collecting the literature on 
Osteomalacia and studying this disease here in the Garden ; 
and by next year will be in a position to make her literary 
report. The title of her paper on carcinoma is indicated 
in another place. It showed how the feeding of sub- 
substances which increased the cholestrol content of the 
blood increased both normal growth and tumor growth 
and those diets which decreased the cholestrol content 
of the blood increased the number of lymphocytes and 
retarded tumor growth and metastases. 
Animal Parasites. 
Routine feces examinations of newly-arrived parrots 
have numbered 38, and all resulted negatively. 
Continuation of the work on Hepaticola hepaticum 
(reported in previous years' reports under the heading 
of Trichosoma hepaticum) has revealed that no doubt 
a large number of the prairie dogs has been affected with 
this disease. There are good reasons for believing that 
it has caused death, for the Superintendent reports 
that the population of the enclosure is heavily decreasi^^g 
and two animals which were kindly furnished to us from 
the enclosure have since died (in the Infirmary) with the 
