158 



Records of the hidian Museum. 



[Vol. XVI, 



Spongilla lacustris var. prolijerens, Annand. 



S. cinerea, Carter 



5. perviridis, sp. no v. 



S. crateyiformis ^ Potts . . 



5. sumatraim, Weber . . 



5. sumatrana var. rivularis, nov. . . 



5. sumatrana var. centralis, nov. . . 



5. carter i, Carter 



Corvospongilla ultima var. spinosa, Annand. 



Artificial pond 

 at Khandalla 



Streams near 

 Chakradiiarpur 



Stream at Me- 

 dha; rocky ar- 

 tificial pools in 

 Satara fort and 

 at Karla in the 

 Poona district. 



Artificial pond 

 at Khandalla. 



Well at Medha. 



Stream at Me- 

 dha. 



Stream at Chak- 

 radharpur. 



Reservoir in the 

 Satara fort. 



Stream at Me- 

 dha. 



Of these species I need only discuss 5. cinerea, S. perviridis, 

 and S. sumatrana with its varieties. 



Spongilla (Euspongilla) cinerea, Carter. 

 (Plate VI, figs. I, la, lb). 



191 1. Spongilla cinerea, Annandale, Fnini. Brit, hid., Freshiv. Sponges, 

 etc., p. 79, fi^. 10. 



This sponge, which appears to be very rare, has been known 

 to me until recently merely from Carter's description, from a 

 dried schizotype of the original specimen from a tank at Bombay 

 and from some very imperfect material from Nasik. Living speci- 

 mens were, however, obtained by Dr. Gravely and myself in 

 Chota Nagpur some months ago and I am now able to differentiate 

 from Carter's species a closely allied form (here described under 

 the name 5. perviridis) that I formerly believed to be a mountain 

 phase of it. 



5. cinerea may be distinguished from all other species of the 

 subgenus Euspongilla yet known by three characters : — 



(I') Its dense purplish-brown or black colour. 



(2) Its very finely spinose or subspinose skeleton-spicules. 



(3) The great regularity of its skeletal structure. 



To take these characters in order. The colour is due to the 

 presence in the cells of both the parenchyma and the dermal 

 membrane ' of minute organized bodies resembling the green 



' This is also tlie case in Cori'ospongilla iilfinin var. spinosa. 



