DENDRILI>A. 29 



The final ramifications of the sl-eleton-&ires are pretty smooth, slightly and 

 irregularly bent, and 0-16 niillim. thick. The pith-cylinder has a thickness 

 equal to about two thirds the thickness of the fibre. 



Geographical Distribution. — South coast of Australia : Port Phillip (Len- 

 denfeld) ; Bass Straits {Selenka). East coast of Australia : Port Jackson (Len- 

 denfeld). 



Dendrilla digitata^ n. sp. 



This sponge consists of a bunch of erect, digitate processes which coalesce 

 for the greater part of their length. The whole sponge attains a height of 50 

 millim. The digitate processes are 3-15 millim. thick. The surface is covered 

 with sharp and slender couuli, which are 3'5 millim. apart. The oscula are 

 oval, 2-4 millim. wide, and scattered over the sides of the digitate processes. 



The final ramifications of the skeleton-^hve?, anastomose more frequently 

 than in other species ; they are straight, and 0-08-0-16 millim. thick. The 

 pith-cylinder is equal to half the thickness of the fibre. The fibres occa- 

 sionally approximate and join to form perforated plates, particularly in the 

 basal part of the sponge. 



Geographical Distribution. — East coast of Australia ; Port Jackson 

 (^Lendenfeld). 



Dendrilla janthelliformis, n. sp. 



This sponge appears as a thick, erect lamella, 70 millim. high and 50 

 millim. broad. It is very lacunose. The surface is covered with very low 

 and blunt conuli. The oscula are situated on the margin, and are 4-7 millim. 

 wide. The colour of the living sponge is dark violet. 



The final ramifications of the skeUton-&oYQS, anastomose more frequently 

 than in some other species ; they are straight, and 0-06 millim. thick. The 

 thickness of the pith-cylinder is equal to half the thickness of the fibre. 



Geographical Distribution. — East coast of Australia ; Port Jackson 

 {Lendenfeld). 



Dendrilla cavernosa^ Lendenfeld, 



Dendrilla cavernosa, R. von Lendenfeld, " Studies on Sponges," Proceedings 

 of the Linnean Society New South Wales, vol. x. p. 557 (1886). 



Digitate, branched sponges, attaining a height of 400 millim. The digitate 

 processes are straight, cylindrical, and 25 millim. thick. The surface w 



