194 Journal of the Asiatic Suciety of Bengal. [May, 1906, 
individuals close together in a natural cavity of the Sponge. The 
pupa lives free in the water. 
Fig. 2. Chironomid Larvee from S. carteri. 
A =Chironmus sp.,x 10. B= Tanypus sp., x 20. 
A small Beetle larva (PL 1, Fig. 3) occurs somewhat sparingly 
In wi 
tightly to any object, and the end of the abdomen is generally 
bent beneath the rest of the body like the “tail” of a lobster. 
If the larva is dislodged, however, it straightens itself and moves 
ong by means of its legs, with a curious jerky gait. I have 
usually found it near the centre or the base of the Sponge. 
Sisyra sp. (larva). Pl. 1, Fig. 2. 
wsyra fuscata, which is found duri er in the canals of 
es fiuviatilis, Indeed, I cannot find any definite character 
whereby the Indian form could be distinguish m the Huro- 
ee but possibly the eyes are better developed in the former- 
and head. The abdomen a es the Kuropea a 
. ‘ ropean form, bears ° 
ventral surface seven agg of jointed appendages which appa 
rently function ag gills. There is a pair of very fine, stiff, 
