REVISION "BRITISH SPONGIADJE.'* 187 



Beniera pocillum, B., LIII. 

 pygmea, B., LVI. 

 ramuscula, B., LIII. 

 rosea, B., XLIX. 

 simplex, B., XLIV and L. 

 simulans, Johnston, LI. 

 varians, B., XL VIII and LXXXVIII. 

 Genus Gellius, Gray. 

 Skeleton formed of a more or less regular network, 

 never of fibres. Megascleres diactinal. Microscleres 

 sigmata and (or) toxa. 

 Note. Bowerbank omitted to describe and figure the 

 sigmata amongst the microscleres of Gellius angula- 

 tus. Bidley and Dendy (14, p. 44) who examined the 

 type specimens in the British Museum, discovered that 

 spicule, and referred the sponge to the genus Gellius. 

 Gellius angulatus, B., XLI. (Topsent, 18, p. 76.) 

 ,, couchi, B., LXXIII. 

 ,, fallax, B., LI. 

 ,, jugosus, B., L. 



c. Sub-family Spongillin^e . 

 Fresh water Sponges. 



Genus Euspongilla, Vejdowsky. 

 Megascleres smooth or spined. Gemmules covered 

 with small spined spicules. 



Euspongilla lacustris, autt., LX. (Weltner, 23, p. 



12 ; 24, p. 260.) 

 Genus Ephydatia, Lamouroux. 

 Megascleres smooth or spined. Gemmules covered 

 with amphi discs the edges of which are indented. 



Ephydatia fluviatilis, Pallas, LIX. (Weltner, 24, 



p. 245. 

 ,, parfitti, Carter, LXXXVI, 



„ sceptrifera, B., LXXXVI. 



