230 Journal of the Asiatic Society of Bengal. (June, 1913.] 
Rotifera disappeared after a few weeks and neither has since 
(in se Ses re-appeared. Mr. Rousselet has sent the following note 
on them A.] 
Oecistes socialis, Weber. 
This species was first discovered by Dr. Weber in the 
neighbourhood of Geneva and described by him in his paper 
‘*Rotateurs des Environs de Genéve,’’ Arch. de Biologie 1888, 
and afterwards he | a better and fuller account in his greater 
work, ‘‘ Les Rotateurs du Bassin du Léman,’’ Revue Suisse de 
Zoologie V, 1898. 
e animals secrete gelatinous tubes which become agglo- 
merated into a rounded gelatinous ball as much as 5 mm. in 
diameter and containing thousands of individuals. In recent 
years the species has also been found by Dr. de Beauchamp in 
the neighbourhood of Paris (in 1901), and John Shephard found 
it in Victoria, Australia, and gave it the name of Lacinularia 
elongata (1896). In England I have obtained it once from 
Dundee. 
The species is however a rare one, not often seen. 
Limnias ceratophyili, Schrank. 
This is a well-known and fairly common Rhizote or fixed, 
tube-dwelling Rotifer, found in many parts of the world. 
When very abundant and under favourable food conditions, the 
young frequently attach themselves and fix their tubes to the 
parents in a very irregular fashion. All particulars as to their 
anatomy will be found in Hudson and Gosse’s monograph. 
It is a quite cosmopolitan species. 
NS PF ONS UR 
