PETTERD : ON FRESHWATER SHELLS OF TASMANIA. 87 



Habitat— First Basin, Launceston. Somewhat plentiful; 

 very distinct from anything previously known. 



S^. Unio moretonicus, Sow. 



Habitat — Esk River, and most of the larger streams 

 emptying into Bass Straits. Our only species; abundant in 

 the northern streams but not the southern. 



34. Cyclas tasmanica, Tennison Woods. Pro. Royal Soc. Tas., 

 August, 1875. 



Widely distributed in almost all the streams throughout 

 the Island. 



35. Pisidium Dulvertonensis, Tennison Woods. Pro. Royal 

 Soc. Tas., August, 1875. 



Habitat— Lake Dulverton. 



36. Pisidium tasmanicum, Tennison Woods. Pro. Royal 

 Soc. Tas., Aug., 1875. 



Habitat — In most streams and pools. 



In a paper contributed to the Royal Society of Victoria, 9th 

 Aug., 1877, the Rev J. E. Tennison-Woods describes the follow- 

 ing species. The majority of those from Tasmania were collected 

 by me, and form part of a series now in the National Museum of 

 Victoria. 



1. Birosira McCoyi. Waterhouse, Tasmania, 



2. Olivella Austmlis. Clark's Island, Bass Straits. 



3. Mangelia HarTisoni. „ „ 



4. „ trachys. Brighton, Victoria. 



5. Rissoina Kershawi. Long Bay, Tasmania. 



6. ,, suprascidpta. ,, ,, 



7. Bittiiim semilcevis. North-west Tasmania. 



8. Thalobia maricE. Port Phillip Heads, Victoria, 



9. ,, tesselaia, „ ,j ,j 

 10. „ duhia, Clark's Island, Bass Straits. 



