by r. von lendenfeld, ph.d. 545 



Shape and Size. 



JSusjJongia foliacea is a ceratose species, differing from the 

 common species of Euspongia, only in its flattened form. There 

 are numerous small pores scattered all over one side (the front) of 

 the sponge. Size ? 



Colour 1 



Surface. 



On the surface there are conic deviations. With the exception 

 of a few fragments of spicules of diflerent thickness, found singly 

 and rarely in a few fibres, more numerous in the surface, there are 

 no spicules at all. They seem to he foreign bodies taken in, in 

 small quantities into the surface-tuft. 



Canal System"? 

 Skeleton, 



The fibres of the main skeleton agree in their consistency and 

 non-rectangular arrangement with those of Euspongia, and as 

 stated already, foreign bodies are the exception even in the surface 

 tufts. The diameter of the fibres is -4 to '7 mm., except in delicate 

 Ditela network of the surface and interstices, where it is only 

 •0085 to -022 mm. 



This desci'iption is hai'dly suflicient. 



Geographical Distribution. 

 North Coast of Australia ; Torres' Straits, West Island ; (Alert.) 



Bathymetrical Distribution 1 



82. SPECIES. EUSPONGIA SILICATA. Nova Species. 



Shape and Size. 



The specimens which I refer to this species are small, hori- 

 zontally extended, lohed and vertically compressed. The largest 



