HELIX. 133 



molested, H. Pisana will probably ere long be as 

 abundant in Guernsey as it is in the neighbouring 

 island. In ' British Conchology,' vol. i. p. 208, Gwyn 

 Jeffreys remarks that "the limited range of this 

 species in Great Britain is unaccountable ; " he also 

 says that he made two unsuccessful attempts to 

 colonize it on the sandhills near Swansea, " by 

 bringing a basketful of live specimens from Tenby, a 

 distance of only about thirty miles," and spreading 

 them over the Burrows, and that, "although they 

 seemed at first to thrive tolerably well in the new 

 locality, they did not multiply, and the birds soon ate 

 up the immigrants." During the autumn of 1874, 

 being in the neighbourhood of Swansea, I visited the 

 Burrows and was much pleased to find that his colony, 

 instead of being extinct, had increased immensely. 

 The foreign distribution of this extremely beautiful 

 shell is by no means confined to the sea-board ; it 

 occurs abundantly in the centre of France and Spain ; 

 the fact of its range in this country being limited to a 

 few places on the sea-coast is therefore suggestive of 

 the idea that it may have been originally brought over 

 in ballast from the Continent, or perhaps from Jersey. 

 This species seems to be totally regardless of the 

 unpleasant consequences of a coup-de-soleil, it may 

 frequently be seen clinging to plants which its voracity 

 has rendered all but shelterless, unconscious, appa- 

 rently, of the scorching rays of a mid-day summer 

 sun. 



Var. alba. — Shell pale yellowish-white, or snow-white, with or 

 without translucent markings, B.C. 



