256 Proceedings of tJie Royal Society of Victoria. 



R.N. 454 (s. 9, 20 f ; "olive grey.") 



B.AI. sp. 26 (" Chondropsis arenifera C. one of types." Reg. 

 86-12-15-149). 



Chondropsis carteri, n. sp. 



The single specimen is small, massive, rounded, constricted 

 below and somewhat flattened above. The vents are minute and 

 grouped on the upper part. The surface is smooth but rather 

 uneven, minutely reticulate in patches. The texture in spirit is 

 compact, but rather compressible, resilient, and the colour pale 

 yellowish grey. 



The main skeleton consists of numerous stout sandy tracts or 

 Hbres running more or less parallel with one another towards the 

 surface, and varying greatly in thickness and definition. These 

 sandy fibres are accompanied by numerous strongyla, and occasi- 

 onally connected transvei-sely by loose bands of the same distinctly 

 enveloped in spongin. The strongyla also occur abundantly 

 scattered through the ground substance, and in loose whisp-like 

 tracts running towards the surface. There is a soft dermal cortex, 

 a little more than a millimetre thick, beneath which the sandy 

 fibres cease. This cortex contains numerous, rather regularly 

 disposed, slender, radiating tufts of strongyla, and numerous 

 loosely scattered sand grains. 



Megascleres, very numerous, straight, slender strongyla, 

 measuring about 0-23 by 0'003 mm. 



Microscleres, abundant, rather long, hair-like rhaphides ; scattered 

 and in loose whisp-like bundles (trichodragmata). 



R.N. 978 (s. 5.) 



Genus Rhap/iisia, Topsent.* 



Heterorrhaphidfe Avith oxea for megascleres and only trielio- 

 dragmata or scattered rhaphides for microscleres. 



I accept the genus as proposed by Topsent, but I c;innot agree 

 with tliat author in placing it amongst the Renierince. 



Rfiapliisia anonyina, Carter, sp. 

 ylmorpliina aiionyma, Carter, A. M.N. H., January, 188(3, p. 49. 

 Massive, lobose or irregular, often compressed ; with usually 

 large vents abundant on prominent parts. The surface is smooth 



* Arch, de Zool. Exp. et GiJn. T. x. 1892, p. 20. 



