HELIX. 125 



zonaria. Donovan^ ii. tab. (30. 1800. —Helix zonaria var. 

 Penn. B.Z. iv. 137. t. 85. f. 133. a.— Helix pisana. Dillwrjn, 

 p. 911. — Helix subalbida. Foir. Prod. 83. — Helix ericetorum 

 Chemn. C. C. ix. 1194, 1195. — Xerophila variabilis and X. 

 Treversii. Held. Isis, 1837, 917. — Theba virgata and T. 

 Treversii. Peck, Ind. 14. — Helix monilifera. Menke, Syn. 

 22. — Helix Treversii. Michaud, Moll. France, 26. t. 14. 

 f.20, 21. ; Ross. Icon. ix. f. 565. — Helix elegans. Wern. Trans. 

 vi. 524. t. 24. f. 9. (not Drop.). — Helix disjuncta. Turlon, 

 Conch. Diet. 61. f. 63. — Helix istriensis. Ziegl. 



On short grass, on sandy plains, especially about 

 the sea-coasts. {Petiver as Heath Shells.) 



Animal purplish-ash ; foot thick, yellowish. 



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 several 

 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 opaque white with transparent white bands, the 

 tip generally black ; about the mouth and pillar dull 

 rufous ; aperture longer than 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. 



Varies greatly in size,being sometimes three fourths 

 of an inch in diameter, and at others not one third of 

 that size ; in colour, being sometimes pellucid white 

 and bandless,and generally opaque and very distinctly 

 banded ; and, from the number of its bands, it offers 

 an almost endless variety of banding: sometimes the 

 colouring which forms the bands is suffused over 



