52 



known forms of Tasmanian land shells, whicli are still 

 retained by Mr. Petterd and myself as of specific value. As 

 the south-western portion of the island has not yet been 

 systematically investigated in any place, the absence of 

 record from thence of wide-spread species may be taken as 

 of no particular value. 



On another occasion I intend drawing the attention of 

 members to the distribution and variability of the fresh-water 

 shells of Tasmania. 



Shells widely distributed, and not confined to any par- 

 ticular district (22) :— Helix derelicta, H. Hobarti, H. 

 Legrandi, H. Morti, H. Marchianse, H. M'Donaldi, H. 

 Nelsonensis, H. parvissima, H. pictilis, H. ruga, H. 

 Sinclairi, H. Stephensi, H. subrugosa, H. Spiceri, H. 

 Stanleyensis, H. Diemenensis, H. ccesus, H. Halli ; Bulimus 

 Dufresni, B. Tasmanicus; Yitrina Verreauxi; Succinea 

 australis. 



Shells hitherto found only in the N.E. district of Tasmania. 

 —[Note.— The districts KE., K W., K, S., E., W., S.E., 

 S.W., are determined by a meridian line drawn through Port 

 Sorell (146 o) and 42© parallel of latitude.]— (8) :—H. 

 Jungermannise, H. Launcestonensis, H. Lottah, H. Mathinna, 

 H. Officeri, H. Roblini, H. Trucanini, H. Tamarensis. 



Shells hitherto found only in the S.E. district of Tasmania 

 (12) : — Helix Bassi, H. Cura9oa, H. Gunni, H. Henryana, H. 

 positura, H. Petterdi, H. pulchella, H. rotella, H. sitiens, H. 

 TasmanisD, H. Vitrinaformis ; Succinea Legrandi. 



Shells hitherto found only in the N.W. district of Tasmania 

 (12): — Helix antialba, H. Bischoffensis, H. Du Cani, H. 

 Gadensis, H. Hamiltoni, H. Hookeriana, H. lamproides, H. 

 Otwayensis, H. Savesi, H. Wynyardensis, H. Weldi; Vitrina 

 iumosa. 



Shells hitherto found common to the two northern districts 

 only (10) :— Helix Barrenensis, H. Dyeri, H, Furneauxensis, 

 H. Kingi, H. Kershawi, H. lampra, H. limula, H. mimosa, 

 H. plexus, H. pictilis. 



Shells hitherto found common to the two eastern districts 

 only (4) : — Helix cellaria, H. Collissi, H. Luckmani, H. archi- 

 tectonica. 



Shells hitherto found common to the two southern districts 

 only (2). — Helix tranquilla, H. trajectura. 



