EXPLANATION OF PLATE VL 



Freshwater sponges from Bombay and Chota Nagpur. 



Spongilla cincrca, Carter, 



Fig I. — Vertical section through middle region of skeleton with 

 gemmules in situ, X 30. Schizotype from Bombay I. 



,, la. — Typical skeleton-spicule. X 250. 



,, lb. — Part of same spicule^ X 750. 



Spongilla perviridis, sp. nov. 



Fig. 2. — Vertical section through middle region of skeleton, X 30. 

 Specimen from Yenna R. 



„ 2«. — Typical skeleton-spicule, X 250. 



,, 26. — Part of same spicule, X 750. 



Spongilla sumatrana var. centralis, nov. 



Ftg. 3. — Vertical section through skeleton, X 30. h = basal mem- 

 brane with microscopic algae, d = dermal membrane 

 with free microscleres. vSpecimen from Chakradharpur. 



A 

 I 



