186 MR. H. G. PLIMMER ON DEATHS 
15. Two of these were lympho-sarcomata of the abdominal 
glands in two sheep, mother and son, from the same house. The 
others were an angiosarcoma of liver in a Coypu rat, a sarcoma of 
the scalp in a Cercopitheque, and an adeno-sarcoma in a Rail. 
16. The diseases grouped under the term malaria were due in 
12 instances to Hemoproteus danilewskyi and in 6 instances to 
Plasmodium precox. 
16, 17, 18, 19, 21. See the section on blood-parasites below. 
20. This was a very considerable infection of the muscles of a 
Langur, which was not visible to the naked eye. 
22. There has been a considerable decrease in the number of 
rickety mammals. 
In comparing the deaths recorded in this Report with those of 
the five preceding years, there are two points which seem to be 
in continual prominence, and which must therefore be of practical 
importance. The one is the fact that a large number of animals 
—in the large sense—nearly half of the total number, have died 
within six months from their admission to the Gardens, the 
majority of these dying within three months. Of these, a large 
number die of microbic or parasitic diseases. 
The other fact is that a very large percentage of animals have 
died from inflammatory conditions of the alimentary tract which 
cannot be attributed to mechanical or microbic causes, and which 
are apparently due to some defect in their food, the quality or 
quantity or both not being suitable to the animal. 
From a consideration of these facts, it would seem possible that 
the point first mentioned could be dealt with practically by a 
proper and effective quarantine, which would prevent the intro- 
duction into the Gardens of new infections, or of those already 
existing there, in a condition of increased virulence. 
As regards the cases next mentioned, a careful consideration 
by experts of the feeding of the animals throughout the Gardens, 
would enable reasonable and physiological alterations to be made, 
and probably would reduce effectively the death-rate from 
this cause. 
BiLoop-PARASITES. 
During the year the blood of every animal which died has 
been examined, with the result that parasites have been found in 
138; in 60 species for the first time. 
They have been distributed as follows :— 
Filarie. In 5 mammals; found in 3 species for the first time. 
28 birds; in 20 species for the first time. 
5 reptiles ; in | species for the first time. 
Trypanosomes. In 8 birds; in 5 species for the first time. 
2 reptiles. 
