THE ANIMAL PARASITES 659 
vomitus for the worms, hoping thereby to get a greater 
concentration of ova, wliich would facilitate the micro- 
scopic examination. Hypodermic injections of apomor- 
phine (0.1 grain) into an amazon did not induce vomiting 
from the gizzard as hoped — only a regurgitation from the 
crop, but it did cause some dizziness and most ludicrous 
talking and laughter. 
To illustrate further the diflSculties of animal medi- 
cation I quote our experience mth four red howling 
monkeys {Alonatta seniculus). One of these died of intes- 
tinal obstruction from large ascarids — the case which 
has been already cited. Ova were found in the stools of 
the remaining three, and one of the monkeys was treated 
twice mth santonin. It died in thirty hours after the 
second dose — not of santonin poisoning, for none of the 
clinical symptoms were present, but most likely from ab- 
sorption of toxic substances originating in the decom- 
posing ascarids which crowded the gut. It profits not 
to destroy these parasites, then, unless we feel assured 
that they may thereafter be removed immediately. 
If, for the sake of brevity, I were asked to state in a 
single sentence the practical status of animal parasitic 
disease in this Zoological Garden I would put it thus: 
Since there are various animal parasitic diseases con- 
tinuously present here of which we know, and since fresh 
ones are from time to time cropping out, and since these 
are on the whole of economic importance, it behooves us 
to continue and extend our efforts against an issue extant 
—somewhat through therapeutic means, but far more 
through clinical laboratory examinations, careful au- 
topsy searches, and by rigid general hygienic measures 
such as cage-police, new quarters, isolation, or if neces- 
sary, destruction of the exhibit. 
