208 HELicnxas. 



abruptly inflected above : umbilicus extremely small, narrow 

 and oblique. L. 0-5. B. O75. 



Yar. alba. Shell pale yellowish- white or snow-white, with 

 or without translucent markings. H. Pisana, var. alba, 

 Shuttleworth, Moll. Cors. p. 15. 



HABITAT : On a hill and sand-banks, as well as in 

 gardens facing the sea, at Tenby in Pembrokeshire, to 

 the south and south-west of that charming watering- 

 place (Montagu and others) ; Manorbeer in the same 

 county (J. G. J.) ; St. Ives and Whitsand Bay, Cornwall 

 (Montagu) ; Jersey (Lukis) ; and also (according to Dr. 

 Turton) Balbriggan strand in Dublin Bay. Although 

 local, it is most abundant at Tenby, and is said to be 

 equally so in Jersey and near Dublin. Its foreign dis- 

 tribution seems also to be limited. The centre and 

 South of France, Spain, Portugal, Italy, Judsea, Dal- 

 matia, Illyria, Algeria, Madeira, the Canary Isles, and 

 Azores are the only extra-British localities that I have 

 seen recorded. 



The limited range of this species in Great Britain is 

 unaccountable. I have endeavoured twice, with an in- 

 terval of nearly three years between each attempt, to 

 colonize this beautifully marked and peculiar shell on 

 the sand-hills near Swansea, by bringing a basketful of 

 live specimens from Tenby, a distance of only about 

 thirty miles ; and they were spread over different parts of 

 the Burrows, in order to ensure a better chance of success. 

 But, 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. These experiments 

 were made at different times of the year ; and the soil 

 and herbage on the Swansea sand-hills were the same as 

 at Tenby, the only difference being the aspect, which at 

 Swansea was more easterly. The colouring of the man- 



