Vitrina. Shell not including the whole Slug. 

 Fig. 



14. T. haliotoidea, Brap. — T. europcea, T. scutulum. — Near London. 



Channel Isls., etc., Mc. 



15. V. pellucida, Mtlller, [Helix.) — H.diapliana,Helicolimax,Limacina 



major, etc. — Various parts of the country, under stones, etc., Mc. 

 Eu. Very transparent. 



16. V. Draparnaldi, Jeffreys. — V. oblonga, H. brevipes ? — Less glo- 



bular than 15, R. 



Zonites. Transparent, thin-edged Snails. 



17. 18. Z. cellarius, MUller, (Helix.) — H. and Z. lucida and nitens. — 



Brit, gen., C. 

 19, 20. Z. nitidus, Miiller, (Helix.) — H. and Z. nitens, lucida, tenuis, 

 Succinea, etc. — Less depressed than 17, 18, with larger um- 

 bilicus. 



21. Z. crystallinus, Miiller, (Helix.) — H, Z., Discus, and " Polita" c, 



eburnea, vitrea. — In damp spots, among stones and Moss. Minute, 

 white, transparent. 



22. Z. nitidulus, Brap. — Generally distributed, Mc. Mouth oblique. 



Umbilicus small. 



23. 24. Z. allarius, Miller, (Helix) — H. and Z. glabra, alliacea, nitens, 



tenera, lurida, etc. — Distr. gen., C. Smaller and more convex 

 than 17, 18. 



25. Z. excavatus, Bean, (Helix.) — H. and G. nitida, lucida, etc. — 



Durham, Northumberland, Galway, etc., Mc. Umbilicus very 

 large. 



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



minute. 

 28, 29. Z.puRUSj^fofe?', (Helix.) — H. and Z. polita, and Helicella nitidosa, 

 electrina, etc. — Most common North Engl. Whorls less close 

 and more oblique than 21. 



