BY I'KOFKSSOK T. T. FLYNN, D.SC. 59 



a new species in "Die Fauna Siidwest-Australiens," Bd. III., 

 Lief. 5, and to this publication I would refer those who wish 

 for further information as to its structure and affinities. 



It is somewhat remarkable that this sponge should be 

 recorded from collecting grounds so far apart, but it is in the 

 highest degree probable that rigorous search will disclose its 

 presence in intervening localities. 



The discovery of this sponge, occurring as it does on the 

 mainland and in Tasmania, adds another link to the chain of 

 relationships which connects the fauna of this island with 

 that of the continent (i). It may not be out of place to draw 

 attention to the occurrence, in the same district of Tasmania, 

 of the fresh-water crab, Hymenosoma lacustris, Chilton, 

 originally found in New Zealand, and since recorded from the 

 Australian continent, from Norfolk Island, and from Lord 

 Howe Island (2). 



I may perhaps hope that the publication of this short 

 note may stimulate our young zoologists to the gathering of 

 further species of this interesting, but, at present, little- 

 known group of fresh-water invertebrates. 



(1) An admirably clear and concise summary of the then existing 

 knowledge of those relationships was jtiven by Professor W. Baldwin 

 Spencer in his Presidential Address to Section D, Bioloiry, of the Aus- 

 tralasian Association for the Advancement of Science at its Hobart mcot- 

 ing in 1802. 



(2) See Professor Chas. Chilton, Pnp. & Proc. Roy. Soc. Tas.. 1019. 



