TASMANIAN LAND SHELLS. 43 



INTRODUCED SPECIES. 



67. — Helix ( ) cellaria — Midler, 



H. Sydneyensis — Cox. 



Mon. 1868, p. 9, pi. ix, fig. 16, and pi. xviii, fig. 3, 3a. 

 Legrand, Col. for Men., sp. 63. 



A depressed, transparent, highly polished shell of a yellowish colour. 

 It is a well-known abundant European species, and a great wanderer ; it 

 has become acclimatised in many widely distant parts of the world. 

 Mr. J. S. Gibbons states (Quarterly Journal of Conchology, August 

 1878) that it is thoroughly settled in St. Helena, Madeira, and the Cape 

 of Good Hope : in the latter place it appears to have become wonder- 

 fully prolific, for he states — " I never saw H. aspersa so abundant as 

 near Cape Town, while Z. cellarius occurs literally in hundreds in the 

 space of a few square feet near a waterfall." 



I have collected it abundantly in Launceston and Hobart Town in 

 cellars, yards, and such like places. Tn Sydney, New South "Wales, it 

 is also very plentiful, and I have received large numbers from Auckland, 

 New Zealand, so that we may look upon it as thoroughly settled in 

 Australia. 



Mr. C, E. Beddome informs me that he recently placed some living 

 specimens of the well-known garden snail of Europe. Helix asjjcrsa, in a 

 gully on his property in Queenborough. So that, possibly, in a few years 

 we will have it as plentiful about Hobart Town as it has become in the 

 vicinity of Melbourne, Victoria. If a desirable acquisition or not I am 

 not prepared to say. I may state that in Victoria Bidimus acutus and a 

 small Planorbis have become acclimatised. In all probability the land 

 snails were introduced in mould with plants, but it is difficult to account 

 for the introduction of a fluviatile species, as in the case of the Planorhis. 



68. — Helix ( ) pulchella — Midler. 



H. AlexandrcE — Cox. 



Cox, Mon., 1868, p. 61, pi. vi., fig. 1. 

 Legrand, Col. for Mon., sp. 16. 



A minute neat shell of almost smooth texture and beautifully clear 

 white, with a thickened peristome. Introduced from Europe, where it 

 is very abundant and widely dispersed, into Sydney, N.S.W., and Hobart 

 Town. At the latter it has become plentiful in and about gardens, and 

 may be frequently met with in flower-pots, generally in considerable 

 quantity. This pretty little species is pre-eminently a wanderer, for it 

 is not only found throughout the whole extent of the European Conti- 

 nent but is also plentiful in Noi-thern Asia, Madeii-a, &c. ; it albo^ 



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