l6d PETTERD : NEW AUSTRALIAN SHELLS. 



This form comes so near A. tasmanica Tenison 

 Woods, that it may prove to be identical. It appears 

 to be broader with the apex more twisted. 



The following is a list of the species of fresh-water shells 

 I collected at the Richmond River ; — 



1. Physa fusiformis N. & T. 



2. „ Sp. ? 



3. Ancylus assimilis mihi. 



4. „ sp. ? A much longer, narrow 

 form, very thin and pale colour. Pending the 

 examination of additional examples I have pro- 

 visionally named it A. oblonga n. sp. 



5. Planorbis sp. ? 



6. „ sp. ? Both very small representa- 

 tives of the genus. 



7. Melania Tate! Brazier. 



8. Bithynia Richmondiana mihi. 



9. Amnicola positura mihi. 



10. Sphaerium sp. ? 



11. Corbicula sp. ? 



12. Unio sp. ? 



Colonizing Land Shells in East Sutherlandshire. 



— I have introduced colonies of the following shells into the 

 lower part of the basin of the Brora river, after satisfying myself 

 that none of them existed in a living state in the parish of 

 Clyne, Sutherlandshire : — Bulimus aciitus from Llandudno ; 

 Helix virgata from Llandudno ; H. ericetorimi from North 

 Sutherland ; H. aspersa from Banff. The three first are still 

 living and likely to hold their ground, but I have lost sight of 

 H. aspersa, probably killed out by Blackbirds. — W. Baillie, 

 Oct. 24th, 1883. 



J.C, iv., Jan., 1884. 



