HELICID.E. 165 



This genus is divided into two sections, which may 

 prove genera : 



a. Shell brown or varied, striated. Verticillata 

 Ferussac, n. 1 3. 



b. Shell hyaline, greenish or pale brown, polished. 

 Hyalines Ferussac, n. 4 12. 



a. VERTICILLAT^E Ferus. 

 Shell brown or varied, striated. 



45. 1. ZONITES rotundatus. Radiated Snail, (t. 5. 



f. 44.) Shell flattish, slightly carinate, deeply 



striate, rufous-grey with chestnut spots. 

 Helix radiata. Montagu, p. 431. t. 24. f. 3.; Da 



Costa, p. 57. t. 4. f. 15, 16.; Turton, Man. ed. 



1. 59. f. 44. 

 Helix rotundata. Mutter, 29.; Drap. p. 114. t. 8. 



f. 4.; Brard, p. 51, t. 2. f. 10, 11.; Jeffreys, L. 



T. xiii. 342, 



Zonites radiatus. Leach, Moll. p. 102. 

 Var. b., spire quite flattened. 

 Helix Turtoni. Fleming, Brit, Anim. 269. 



albella. Linn. S. Nat. 



rotundata. Turton, Diet. p. 53. 



Var. c., white, transparent, and without rays. 



Common under stones and wood, on hills. 



Animal pale grey, dotted above ; foot short, hyaline : 

 back, head, and tentacles blackish. (Sturm.) 



Shell about a quarter of an inch in diameter, 

 nearly equally convex on both sides, slightly carinate, 

 strongly and regularly striate across, yellowish or 

 reddish-grey with chestnut rays from the centre ; 

 aperture semilunar, as wide as long, thin and not re- 

 flected; umbilicus large and deep. 



