756 
MISCELLANEOUS NOTES AND OBSERVATIONS. 
Hydra. — This inhabitant of the ponds and ditches has not been 
so plentiful in my district, and Hydra viridis lias been conspicuous 
by its absence in most ditches. I find that a fair quantity of 
Entomostracan life is favourable to Hydrse of all species. 
Rotifera. — These have been plentiful in all species previously 
notified, but there being in this particular district no other collectors 
that I am aware of, I am not able to compare notes with other 
observers. Particular species have been fairly constant in the 
Rollesby and Filby Broads, but in the smaller Habitats the com- 
paratively low prevailing temperature of the summer months was 
fatal to a large number of species. 
Personally, I shall be greatly obliged to any observer and 
collector of pond-life who will send me the results of work in his 
particular district with a view to increase the list of species in 
the various genera already noted. — II. E. IIurrell. 
PRESENTED 
1 9 m w 
Xj 
