14. P. antivertigo, Drap.—P., V., Alæa octodentata, septemdentata, palustris, etc.—Near Swansea and London; Bristol, Devon, Northumberland, Ayr, Mr. Ireland. Aperture subtrigonal, eight or nine teeth.
15. P. pusilla, Müller.—Helix vertigo, and V. heterostropha.—S. Wales, Northumberland, Belfast, etc., Mc. Sinistral, with seven teeth.
16. P. Venetzii, Charpentier.—Turbo, Vertigo, and P. vertigo and angustior.—Swansea, Cork, Clare, R. Sinistral; four teeth and a flat fold on columella.
Balea.
17. B. fragilis, Drap. (Pupa.)—Bulimus, Pupa, Clausilia f., perversus.—C. and gen. Under bark on trees, and under stones.
Clausilia. With a twisted clausium on columella.
18. C. laminata, Mont.—Helix, Turbo, Bulimus, and Pupa bidens and perversus and derugata.—S. Brit. principally. Among dead leaves, and on Beech-trunks, Mc. Smooth, broad.
19. C. nigricans, Maton and Rackett.—Strombiformis, Turbo, and Odostomia perversus, bidens, parvula, etc.—C. and gen.; under stones, on walls and trees, etc. Narrow, striated.
20. C. biplicata, Mont.—Helix, Turbo, Odost., C. perversa, plicata, ventricosa, etc.—Near London, etc., Mc. Two folds on columella.
21. C. plicatula, Drap.—Turbo and C. conversus.—Charlton Wood, Kent, Hastings, Gloucestershire, etc., R. Numerous plaits on columella above fold.