XXVIII. A NEW SPECIES OF FREDERI- 

 C E LLA FROM INDIAN LAKES. 



By N. Annandale, D.Sc, Superintendent, Indian Museum. 



Fredericella indica, sp. nov. 



Zoarium delicate, branching sparsel^^, recumbent or with 

 upright (or rather dependent), lax branches consisting of two or 

 three zooecia only. 



Zooecia v^xy slender, distinctly but slightly emarginate at the 

 tip, with a strong furrowed keel running along the dorsal surface 

 from the emargination ; the external surface minutely roughened, 

 sometimes with small sand grains adherent to it, practically colour- 

 less but imperfectly transparent. 



Lophophore bearing about twent}^ tentacles, which are of mod- 

 erate length and very slender ; the web at their base very narrow. 



Alimentary canal elongated and slender, practically colourless. 



Statoblast of Fyedericella indica (upper snria.ce). x 120. 



Statoblast variable in shape and size but as a rule broadly oval, 

 sometimes kidney-shaped, surrounded by a stout chitinous ring and 

 smooth on the surface of the lower valve ; the upper valve covered 

 with minute prominences the base of which is somewhat star-shaped 

 and the apex rounded. The prominences sometimes cover the 

 whole surface almost uniformly but are sometimes sparser in the 

 middle than towards the edges. 



Habitat.— Western India; under stones in Igatpuri lake, 

 Western Ghats, Bombay Presidency, and on lower surface of leaves 

 of water-plants in Shasthancottah lake, Travancore ; at both 

 places taken by myself in November. 



The most definite character in which this species differs from 

 F. sultana is the ornamentation of the statoblast, but there also 

 appear to be differences in the structure of the zooecium and the 

 lophophore. From F. tanganyikce, of which the statoblasts are 



