128 DR. H. G. PLIMMER ON PATHOLOGICAL [ Feb. 2 
The seasonal variations of the principal diseases are very much 
as might be expected, and there seems to be little of importance 
to record in this connection. Tubercle remains pretty constant 
all the year round; mycosis has been more prevalent during the 
second and fourth quarters ; pneumonia and broncho-pneumonia 
were more prevalent during the first and fourth quarters; and 
diseases of the alimentary canal have been more marked in the 
latter half of the year. 
There has fortunately been no epidemic amongst the animals 
during the year, and disinfection has been carried out after every 
case of infectious disease, so as to lessen, as far as possible, the 
risks of infection. It will be noticed that there has not been a 
single case of tumour, cancerous or otherwise, in the animals 
examined during the year. 
Notes on the foregoing Tables. 
The following notes refer to a few points of special interest in 
connection with the diseases mentioned in the Tables. 
1. Since the beginning of last year all reptiles have been 
systematically examined, and tubercle has been found in 17 cases 
out of a total of 161; and in 5 snakes, tubercular deposits have 
been found in the lungs. Pulmonary tubercle in reptiles has 
not, I believe, been described before, and the first specimen 
found has been preserved in the Museum of the College of Surgeons. 
Tubercle found in reptiles has so far been all of the avian type, 
both microscopically and in cultures, 
The 88 cases of tubercle in birds seems a large number, but it 
compares favourably with the number of cases recorded” as 
occurring in the Berlin Zoological Gardens between December 
1903 and August 1905. Between these dates 459 birds were 
examined there, of which 118 were tuberculous; our figures show 
that of 479 birds examined only 88 were tuberculous. In two 
parrots examined the tubercle was of the human type, in all the 
rest it was distinctly avian. 
Of the 35 cases of tubercle in monkeys nearly all were of the 
human variety, two, however, were of a distinctly bovine type, 
and in one case the bacilli were of the avian type. 
2. In four of the cases of mycosis the disease was due to 
Aspergillus niger, the lesions being similar to those produced by 
the Aspergillus fumigatus which was the organism associated 
with the remaining 51 cases. 
3. Under the general term Malaria I have grouped a series of 
cases which, so far as I am at present able to state, are caused 
by parasites belonging to either the group of Halteridium or of 
Proteosoma. In these birds the parasites were certainly the 
cause of death, but they were also found in 12 other birds which 
died from other causes. 
A. Several of the filaria found have not been described before 
and are still under investigation. Im some cases two quite 
different kinds of filaria have been found in the same host, as in 
* WVirchow’s Archiy, vol. 90. 
