R. P. CoCKIN 
59 
specimen, from a boy of nine years of age, five other parasites were also 
found. 
The intestinal parasites which were found in the examination of the 
whole series were as follows: 
Nematodes. 
(1) 
Ankylostoma duodenale. 
(2) 
Asearis lumhricoides. 
(3) 
Oxyuris vermicular is. 
(4) 
Trichocephalus trichiurus, 
(5) 
Strongyloides stercoralis. 
Cestodes. 
(6) 
Taenia solium. 
(7) 
,, (1 confusa). 
Protozoa. 
(8) 
Amoeba coli. 
(9) 
Balantidium coli. 
(10) 
Trichomonas hominis. 
(11) 
Paramoecium coli. 
Insecta. 
(12) The larval forms of two of the Muscidae—one of which was Clmjsomyia 
macellaria, and the other being unidentified. 
The percentage infection of the more common of these parasites is 
given in the following table : 
A. 
duodenale 
879 eases 
62-78 »/„ 
A. 
lumbricoides 
986 ,, 
70-42 o/o 
T. 
trichiurus 
... 1083 ,, 
77-35 «/o 
0. 
vermicularis 
149 „ 
10-64% 
S. 
stercoralis 
196 „ 
14-00% 
It will thus be seen that Ankylostoma duodenale was present to the 
extent of 62‘78“/o of the sick population sent up for treatment at the 
Hospitals. Of these cases not two per cent, were sent in for treatment 
for ankylostomiasis; the greater proportion being sent in for inter¬ 
current maladies having, I believe, no connection whatever with this 
disease. Upon looking up my cases I find that of the ulcer cases 75 
were infected, and of those suffering from yaws it was exceptional to 
find a patient who did not harbour the parasite. This relationship is 
extremely close, but only is so because these affections are commonest 
amongst the under-fed, under-paid, and badly-housed peasants who 
work upon the estates. 
Of the cases of the series, which I found to be infected, not more 
than 45 presented definite symptoms of the disease. The patients 
