41 



Helix virgata. Montagu, p. 415. t. 24./. 1. 

 Teba virgata. Leach, Mollusc, p. 93. 

 Helix variabilis. Drap. p. 84. t. 5.f. 11, 12. 

 Helix striata. Brard, p. 36. t. 2./. 5, 6. 

 Helix zonaria. Donovan, ii. tab. Q5. 

 Helix Pisana. Dillwyn, p. 911 . 



Shell about half an inch in diameter, and nearly as 

 much high, usually white with a single dark brown 

 band in the middle of the larger volution, and se- 

 veral irregular ones at the base ; but subject to 

 infinite variations from the presence or absence or 

 confluence of the bands, the most singular of 

 which is that of a dark brown with a single white 

 band, and that of a pure opake white with trans- 

 parent white bands : the tip generally black : about 

 the mouth and pillar dull rufous : aperture longer 

 tlian broad, the margin thin and reflected at the 

 umbilicus, which is small and deep. 



When young, the larger volution slopes to a some- 

 what carinated edge. 



Perhaps the Troclius terrestris of Donovan, Plate 

 HI., with a spiral brown streak round the middle 

 of the volutions, may be a conical variety of this 

 very variable species. 



In vast abundance on sandy plains, especially about 



the sea-coasts. 

 In the autumn these shells are often suddenly 



