Balea. 



Kg. 



17. B. fragilis, Drop. (Pupa.) — Bulimus, Pupa, Clausiliaf., 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 Helens and 



perversus and derugata. — S. Brit, principally. Among dead 

 leaves, and on Beech-trunks, Mc. Smooth, broad. 



19. C. nigricans, Maton and RacJcett. — Sir omb if or mis, Turbo, and Odo- 



stomia 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. 



Zua. 



22. Z. ltjbrica, Miiller, (Helix.) — Turbo, Bulimus I., subeylindrica, 



muscorum, etc. — C. and gen. Among leaves and under stones. 



Azeca. 



23. A. tridens, Pulteney, (Turbo.) — Helix, Pupa and Cionella Goodallii, 



Britannica, etc. — C. and general. Habits as Zua and Pupa. 



ACHATINA. 



24. A. acicula, Miiller. — Buccinum, Bulimus, Helix octona, terrestre, 



etc. — In marshy places, among Grass, etc., C. S. Eu. 



Cyclostoma. Snail with operculum. 



25. C. elegans, Miiller, (Nerita.) — Turbo reflexus, T. tumidus, slriatus, 



elegans. — Chalky districts of S. Engl., C. 



Acme. Cylindrical Snail with operculum. 



26. A. lineata, Drap. (Auricula.) — Turbo, Carycliium, Cyclostoma, 



Bulimus fuscus, Cochlea minuta. — Bristol, Pembroke, Clare, 

 Dublin, etc., E. 



