142 PNEUMO^OBRANCHIATA. 



34. ; Brard, p. 56. t. 2. f. 9. ; Alder, M. Z. §• 



B. ii. 109. 

 Helix paludosa. Walker, T. M. R. f. 23. ; Mont. 



p. 204. Linn. Trans, viii. p. 193. t. 5. f. 5. 

 Turbo paludosus. Turt. Diet. p. 228. 



- helicinus. Lightfoot, Phil. Trans. 1786. 



Zurama pulchella. Leach, Mollusc, p. 108. 



Helix minuta. Say. 



Amplexus paludosus. Broicn. 



Acrenellus. Broicn. 



Vallonia Rosalia. Risso. ? 



Lucena pulchella. Hartmann, t. 1. f. 6. 



Var. 1. With regular oblique raised transverse 



striae. 

 Helix pulchella. Drap. p. 1 12. t. 7. f. 30—32. 



crenella. Mont. p. 441. t. 13. f. 3. 



costata. Miiller ; Alder, Mag. Z. Sf B. ii. 



109. 



Inhab. under stones and on walls, &c. 



Animal white or whitish; upper tentacles longish, 

 slender, cylindrical, lower short; eyes black. {Sturm, 

 t. 15.) 



Shell the tenth of an inch in diameter ; aperture 

 nearly circular, being very little interrupted by the 

 penultimate volution ; the peristome margined and 

 flat ; umbilicus large and deep. 



The specimens found in marshy damp situations 

 are marked with elevated cross bands, which are the 

 vestiges of former mouths. Those that are found in 

 dry situations, under stones, in shells, &c, are gene- 

 rally destitute of any such ribs. 



In Helix aculeata and H. lamellosa it is the perios- 

 traca only that is raised into concentric lamellae. 



