116 Journal of the Asiatic Society of Bengal. | April, 1906, 
which later preys on Hydra are very frequently eaten, possi 
pen ee ces than any other ppecies, and a common Ephem 
res but little bette 
ood i is anally ‘ake in the earl ; morning, before the heat a 
—, become great. This is the period when life seems 
be gen most a: in the tanks. = Calontéa, Hydra a | 
not feed at “night, but ains between set and dawn, at any 
rate “whee in an aquariom, “with pastially Eaaenied tentacles. 
PP NP A NLL PF Mt es woe 
