326 DISEASE IN WILD MAMMALS AND BIRDS 
feeding meat, the inference is direct that high protein 
diet stands in some relation to this condition. Thirty- 
nine of our sixty tliyroid lesions occurred in the order 
Carnivora ; all the families of land varieties are repre- 
sented; 8.1 per cent, of the specimens coming to autopsy 
showed definite thyroid alterations. However, marsu- 
pials have also a decided thyroid vulnerability as 
indicated by 4 per cent, of the specimens presenting 
abnormalities at death. Four of the seven cases were 
among the carnivorous opossums and "devils," the 
remaining three being in herbivorous kangaroos. The 
influence of high protein diet is not evident in birds. 
A discussion of the essential pathology can be based 
upon the accompanying table. In making a diagnosis 
care was used to exclude mild swelling of the gland seen 
in acute infectious disease and under conditions of sexual 
actiWty. The gross diagnosis was checked by micro- 
scopical section, and all but a very few have been 
reexamined for the purpose of making the table. 
Table 16. 
Showing Distribution of Lesions in the Thyroid Body by Gimng the Number of 
Cases Met in the Autopsies upon the Various Orders, According to the Classifi- 
cation Given in the Text. 
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Carnivora 
39 
7 
6 
5 
4 
9 
1 
1 
1 
7 
Rodentia 
1 
1 
Ungulata 
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1 
1 
Marsupialia 
7 
1 
1 
1 
1 
8 
Passeres 
2 
2 
2 
1 
1 
Psittaci 
Accipitres 
1 
1 
Galli 
2 
1 
1 
1 
1 
Alectorides 
Anseres 
3 
2 
Total 
60 
12 
11 
7 
6 
12 
2 
1 
2 
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