39 
may spontaneously recover unless reinfested. The stake 
seems too great, however, to pass them back to the 
parrot house for exhibition. 
There have been no deaths from spiroptera at the 
parrot house this year. Out of 190 birds exhibited 34 
have died, a percentage of 17. Of. The percentage of 
mortality for 1911 was 23.7, for 1912, 36.3 and for 1913, 
17.2. In this there is a consistent improvement since 
the overhauling in 1912. 
The Mexican Gray Wolf No. 3, which was mentioned 
in last year's report as having been isolated on account 
of infestation with tapeworms, has been cured and re- 
turned to exhibition. It will be remembered that his 
isolation was a prophylactic measure against infesta- 
tion of the nearby ungulates. 
Rhesus Macaque No. 156 has also been returned to 
exhibition after having been detained and treated for 
whip- worms. 
We have never been able to find protozoa (Balan- 
tidium coll) in the feces of our Galapagos Tortoises. 
These organisms are reported, in another garden, to 
have been transmitted to monkeys and to have caused 
colitis. 
Respectfully submitted, 
HERBERT FOX, M. D., 
Pathologist. 
t The figures given in last year's report are erroneously based upon 
the census. They should have been calculated upon the number of birds 
exhibited. 
