60 



Helix rotundata. Drap. 2^' 114. t. 8.f. 4 — 7. 



Brard, ji. 51. t. 2. f. 10, U, 



Zonites raciiatus. Leach, Mollusc, p. 102. 



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 

 reflected : umbilicus large and deep. 



Common under stones and wood. 



45. Helix rupestris. Shell convex, somewhat tro- 

 chiform, blackish-brown, opake, striolate : aper- 

 ture nearly circular : umbilicus very large. 



Helix rupestris. Drap. p. 82. t. l.f. 7 — 9. 

 Zonites rupestris. Leach, Mollusc, p. 103. 

 Helix umbihcata. Mont. p. 434. t. 13./. 2. 



Shell the tenth of an inch in diameter, elevated on 

 the upper side, with five rounded and deeply di- 

 vided volutions, slightly striate, of an uniform deep 

 opake deep chocolate brown : aperture nearly cir- 

 cular, being very little interrupted by the penulti- 

 mate volution, the margin thin and not reflected : 

 umbilicus funnel-form. 



On elevated rocks, and under the top stones of walls 

 and lofty buildings, always in dry places. 



