14. H. pomatia, Linn.—Southern chalky districts, S. Eu., C.
15. H. caperata, Mont.—H. striata, H. crenulala, etc.—Chalk-pits, etc., C.
16. H. carthusiana, Müller.—H. nitida, carthusianella, rufilabris, etc.—Chalk-districts of Surrey and Kent, C.
17, 18. H. nemoralis, Linn.—H. hortensis, fasciata, hybrida, etc.—Cc. A peculiar flattening near the base of aperture.
19. H. arbustorum, Linn.—Common and general. Brown-marbled. Edge of aperture different from 17, 18.
20, 21. H. rotundata.—H. radiata, Turtoni, etc.—Common and general.
22, 23. H. pulchella, Müller.—H. costata, paludosa, crenella, minuta, etc.—Common and general under stones, etc.
24. H. revelata, Férussac.—Cornwall, Devon, Torquay, Guernsey. Rare. A transparent, greenish, hairy shell.
25. H. aperta.—H. neritoides, naticoides, etc.—A single specimen found in Guernsey. Not uncommon in S. Eu. Our specimen is foreign.
26. H. umbilicata, Mont.—H. rupestris, etc.—On perpendicular heights and under stones, C.