Transcriber's Note:

Clicking on each plate, below, will take you to a larger image.

[PLATE I.]

Specimens of Spongilla preserved in spirit.

Figs. 1-3.S. (Euspongilla) alba var. bengalensis (nat. size) from ponds of brackish water at Port Canning in the delta of the Ganges. Fig. 1 represents the type-specimen of the variety, and was taken in the winter of 1905-6. Figs. 2 and 3 represent specimens taken in the same ponds in the winters of 1907 and 1908 respectively.
Fig. 4.Spongilla sp. (? abnormal form of S. (Eunapius carteri)) from an aquarium in Calcutta (× 10).

SPONGILLA

[PLATE II.]

Photographs of dried specimens of Spongilla, Tubella, AND Corvospongilla.