122 
HELICIDJE. 
of the genus ; and monstrosities are sometimes found 
with the whorls reversed, and more or less produced. 
It is one of the most beautiful of our snails, and 
extremely local. It is common in the south of 
Europe and Northern Africa ; but it is not found in 
the northern countries : Wales may be considered its 
northern limit. 
Mr. Jeffreys believes the beautiful pink gloss ob- 
served on the mouths of this and H. virgata to be 
entirely owing to the action of, and exposure to, the 
sun ; for, in the specimens found in more sheltered 
situations, the colours and marking are much fainter, 
and sometimes altogether wanting. {Linn. Trans. 
xvi. 334.) It most probably arises from the animal 
being in better health in sunny places, as it is most 
like the warmer climate in which they appear to de- 
light, beyond the confines of which our specimens 
are living. 
According to Montagu, it is one of our most rare 
species. He only found it in one place, on the sand 
to the west of Tenby, where it is confined to a small 
spot. Mr. Racket has found it at St. Ives, in Corn- 
wall. It has also been said to be found near Dublin. 
England is probably the northern limit of this 
species, which is not found in Germany or Sweden. 
44. 11. Helix fasdolata. Black-tipped Snail. — 
Shell flattish, yellowish, with brown inter- 
rupted bands and spots, and strongly striated 
concentrically ; umbilicus moderate ; mouth 
white, (t. 4. f. 32.) 
Helix caperata, Montagu^ T.B, p. 433. t. 11. f. 11. (1803) ; 
Turton^ Man. ed. 1. 42. f. 32.; Jeffrey Linn. Trans, xvi. 
