222 Journal of the Asiatic Society of Bengal. [June, 1913.] 
scleroblasts, and, indeed, spicules are already well developed 
and have begun to be arranged in fascicles or fibres. 
n the specimen figured a certain distortion of the narrower 
end has been brought about by shrinkage in the preservatives 
used (picro-formol-acetic solution followed by 90% alcohol) and 
it is probable that the projection of one fascicle of spicules 
through the ciliated membrane is not natural. 
is no means certain that all the possibly heterogeneous 
species which I have assigned provisionally to the genus have 
acommon origin ; the skeleton of N. mappa in particular is 
1s;1t may be claimed with confidence that N. mappa at any 
rate is a true Spongillid, for its larva hardly differs from that 
of Spongilla except in being more nearly spherical. Advanced 
Plate VII, fig. 3. 
Fig. 3. Larva of Nudospongilla mappa Annand., x 100. 
The specimen had been stained with picro-carmine and 
mounted, after clearing, in Canada balsam. 
Sit = tai lig giligs epee pe ee 
