l Annual Address. [February, 1912. 
they take a large share in the diffusion of other diseases = 
Ss. an 
tance of these little fish is that they are able to live in very 
shallow water and to work their way in amongst dense surface 
vegetation and thus gain access to the larvae. 
A consignment of these fish was brought from the West 
Indies to India in 1909 and taken to the United Provinces. 
Possibly also experiments were made elsewhere in India, but I 
am not aware whether any definite beneficial results have ac- 
crued from these experiments in India. 
There are three varieties of malarial parasites at present 
known :— 
(1) Plasmodium Malariae ) Thege are only three at pres- 
(2) Plasmodium Vi ent known to cause malaria. 
ever n 
considerably altered in the near future. ‘Usual classification is 
into four classes or phyla—(1) Sarcodina, (2) Mastigophora, 
(3) Sporozoa, and (4) Infusoria. Sporozoa, to which the mal- 
arcodina move and capture food by pseudopodia. 
2. The mastigophora by flagella, and Infusoria by cilia. 
