HELIX. 
125 
zonaria- Donovan^ ii. tab. 65. 1800. —Helix zonaria var. 
Penn. B.Z. iv. 137. t. 85. f. 133. a. — Helix pisana. DillwyiLy 
p. 911.— -Helix subalbida. Poir. Prod. 83. — Helix ericetoruin 
Chemn. C. (7. ix. 1194, 1 195. — Xerophila variabilis and X. 
Treversii. Held. Isis, 1837, 917. — Theba virgata and T, 
Treversii. Beck, Ind. 14. — • Helix monilifera. Menke, Syn. 
22. — Helix Treversii. Michaud, Moll. France, 26. t. 14. 
f.20, 21. ; Boss. Icon. ix. f. 565.— -Helix elegans. Wern. Trans. 
vi. 524. t. 24. f. 9. (not Drap.'). — Helix disjuncta. Turton, 
Conch. Diet. 61. f. 63. — Helix istriensis. Ziegl. 
On short grass, on sandy plains, especially about 
the sea«coasts. iPetiver 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 
