39^ N. Annandai.E : .Votes on Freshivater Sponges. [Vol. I, 1907.] 



skeleton spicules^ which in May are pointed and irregularly inflated, 

 and in July and August are blunt at the extremities and much 

 more nearly regular in outhne ; gemmules are found at both sea- 

 sons but their spicules Ukewise differ in shape {Rec. Ind. Mus.^ i, 

 part 3, p. 273). 



There can be no doubt, therefore, that considerable seasonal 

 variation occurs in the freshwater sponges of the Ganges delta, 

 and, indeed, this might have been expected from the plastic nature 

 of these organisms and the wide range of temperature to which 

 they are exposed in a district on the verge of the tropics. 



Carter, H. J. 

 Potts, B. 



Weber, M. 



Weltner, W. 



Weltner, W. 

 Annandale, N. 



Annandale, N. 



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Spongillidse des Indischen Archipels," 

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Die Siisswasserschwamme," in Zacharias, 

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Spongillidenstudien, III," Archiv f. Natur- 

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Notes on the Freshwater Fauna of India, 

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The Fauna of Brackish Ponds at Port 

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