PETTERD: on freshwater shells of TASMANIA. 83 



11. Physa tasmanicola, Tennison Woods. Proc, Royal Soc. 

 Tas., 1875. 



Habitat — Water-hole, near Mount Murray, East Coast." 



12. Physa Huonicola, Tennison Woods. Proc. Royal Soc. 

 Tas., 1875. 



Habitat — Huon River. A distinct fusiform species. 



13. Planorbis meridional is, Brazier. Proc. Linnean Soc. 

 N.S. Wales, March, 1875. 



P, tasmanicus, Tennison Woods, Pro. Royal Soc. Tas., 

 August, 1875. 



Habitat — Widely dispersed. 



14. Planorbis Atkinson i, Johnston. Pro. Royal Soc. Tas., 

 1878. 



Habitat — Near Launceston. A very distinct shell with 

 a peculiarly angled aperture. 



15. Planorbis Scottiana, Johnston. Pro. Royal Soc. Tas., 

 1878. 



Habitat — Near Launceston. A small black species 

 confined to the North, where it is very plentiful in still waten 



16. Ancylus Cumingianus, Bourguignat. 



Habitat — Streams between New Norfolk and Hamilton. 

 The largest species known and very distinct from any other 

 form, either Tasmanian or Australian. 



17. Ancylus Woodsi, Johnston. Pro. Royal Soc. Tas., 1878. 



Habitat — Vicinity of Launceston. Mr. Johnston enu- 

 meratfes three varieties of this distinct species — a, b and c. 

 Two are probably distinct, and the third a variation of the 

 next species. 



18. Ancylus tasmanicus, Tennison Woods. Pro. Royal Soc. 

 Tas., 1875. 



Habitat — Vicinity of Hobart Town and Launceston. 

 A minute dark-coloured and inconspicuous species. The 

 variety from about Launceston is much lighter in color. 



