250 Proceedings of the Royal Society of Victoria. 



length and one-third of an inch in diameter. These processes 

 may either end blindly and bluntly, or bear small vents at the 

 aummit. The body is fairly compact but compressible and 

 rather spongy, and neai'ly white in spirit. 



Skeleton, in the interior of the body no fibres appear to be 

 developed, and the skeleton consists of loosely but very thickly 

 scattered spicules. The dermal skeleton of the body is obscui'ed 

 by the foreign matter. In the fistulje we have the usual bast- 

 like, reticulate dermal skeleton, strongly echinated by projecting 

 tufts of oxea. Beneath this the cavity of the fistula is partly 

 blocked up by an irregular, close-meshed network of very stout 

 spicular fibre. Towards the surface the meshes became very 

 small and sub-rectangular in shape. 



Megascleres, rather short, slightly curved, hastately sharp- 

 pointed oxea, measuring about 0'12 l)y 0-005 mm. 



I have seen no microscleres. 



R.A^. 321 (18 f ; "body pale butt-brown. Projections white") ; 

 118-t. 



Oceaiiapia coka'?-eus, Carter, sp. 



Phhvodictyon coliccreiis, Carter, A.M.N.H., December, 1886, 

 p. 446. 



My personal acquaintance with this species is limited to a piece 

 of the original specimen sent to Mr. Carter. This specimen was 

 n cylindrical fragment made up of some twenty united tubes 

 terminating in as many vents, all lying close together at the 

 truncated end of the sponge. The skeleton is arranged as usual 

 in the genus, with bast-like dermal network, and coarse, stout 

 spicular fibres in the interior. The spicules are curved oxea, 

 abruptly and bluntly pointed, measuring about O'lo by 0-008 mm. 



B.M. sp. 34 i^' Phla'odictyon colncre/is" Reg. 87-7-11-13). 



. Genus Chondropsis (Carter), n. gen. 



Skeleton composed largely of sand and other foreign bodies, 

 usually (? always) arranged in distinct fibres or columns. Spicular 

 skeleton greatly reduced. Megascleres diactinal, strongyla or 

 tylota. Microscleres nearly always present in the form of sigmata. 



1 liad intended using von Lendenf eld's n&mQ Sigmatella for this 

 genus, but found from Scudder's " Nomenclator Zoologicus " that 

 it was already occupied. 



