Illustrated Index of British Shells / Containing figures of all the recent species

by G. B. Sowerby

25. Z. excavatus, Bean, (Helix)—H. and G. nitida, lucida, etc.—Durham, Northumberland, Galway, etc., Mc. Umbilicus very large.

26, 27. Z. radiatulus, Alder, (Helix.)—Distr. gen., C. Striated, minute.

28, 29. Z. purus, Alder, (Helix.)—H. and Z. polita, and Helicella nitidosa, electrina, etc.—Most common North Engl. Whorls less close and more oblique than 21.

PLATE XXIII.

Helix. Snails with thickened lips.

Fig.

01. H. pisana, Müller.—H. zonaria, cingenda, rhodostoma, strigata, albella.—Cornwall, S. Wales, Dublin, C. S. and N. Eu.

02. H. aspersa, Müller.—H. grisea, hortensis, variegata, vulgaris, etc.—Common in all our gardens and hedges.