118 HELICIDJE. 



Helix lapicida. Linn. S.N. 1. 1241.; Mont. T.B. 435.; Drop. 

 p. 111. t. 7. f. 3537. ; Brard, p. 53. t. 2. f. 14, 15. ; Forbes 

 and Hanley, B. M. iv. 65. t. 116. f. 3, 4. Carocolla lapicida. 

 Lamarck, vi. ii. p. 99.; Turt. Man. ed. 1. f. 51. Latomua 

 lapicida. Fitz. Syst. 97. Helicogona lapicida. Ferus. Prod. 

 150. t. 66*, f. 6. ; Risso, Eur. Merid. iv. 66. Chilotreraa la- 

 picida. Leach, Moll. Syn. 77. ; Beck, Ind. 28. Helix affinis. 

 Gmel. S. N. 3621. Helix acuta. Da Costa, p. 55. t. 4. f. 9. 

 Lenticula lapicida. Held. Isis, 1837, 913. Helix rhe- 

 nania. Hartmann. List. Conch, t. 3. f. 4. ; Pet. Gaz. t. 92. 

 f. 11. 



Var. 2. whitish. Pfeiffer, 2. f. 27. 



In the fissures of limestone rocks, and in woods 

 on a chalky soil. 



Animal green or blackish green ; neck granular, 

 with two dark streaks ; hinder part of the foot yel- 

 lowish. (Sturm, t. 26.) The jaw is strong, with 

 distinct ribs in front and teeth on the edge. 



Shell three quarters of an inch in diameter, finely 

 granulated ; volutions five, the outer one sloping on 

 both sides so as to form a sharp edge in the middle 

 of the margin, which runs spirally round the upper 

 volutions and marks their separation by a fine line ; 

 umbilicus central, large, and deep ; aperture oval, 

 with an indenture or small notch on the inside at the 

 outer pointed extremity where the keel commences ; 

 the peristome broad, thin, white, reflected, united 

 and detached all round. 



Linnaeus, from some fancy, called this shell Lapi- 

 cida or stone-cutter. 



The shell is liable to some variations in size and 

 colour. It is rarely pale greenish, nearly transparent ; 

 it also varies in the distinctness of the brown mar- 

 bling. 



The young shells, as in most other Helices, are 

 much more depressed and more strongly keeled. 



