CONTENTvS. 



Introduction 



Spongilla alba, Carter 



Spongilla nana, sp. no v. 



Cliona vastifica, Hancock 



Suberites sericeus, Thiele 



Laxosuberites aquae-dulcioris, Armandale 



Laxosuberites lacustris, sp. no v. . . 



Tetilla dactyloidea (Carter) var. lingua, nov. 



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