HELIX. 125 



zonaria- Donovan, ii. tab. 65. 1800. Helix zenana" var. 

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

 p. 911. Helix subalbida. Poir. Prod. 83. Helix ericetorum 

 Chemn. C. C. ix. 1194, 1195. Xerophila variabilis andX. 

 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. ; Ross. 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. (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 



