43 



the middle, with regular transverse striae : colour 

 dull yellowish-white, with regular brown bands, 

 which are often interrupted, and the tip black : 

 aperture crescent-shaped, as long as it is broad, 

 with the margin thin and not reflected over the 

 umbilicus, which is large and deep. 

 On dry banks, and under stones in hilly places. 



33. Helix sp'niulosa. Shell conic, brown horn- 

 colour, with the suture deep ; the epidermis rising 

 into thin spinous foliations : aperture semielliptic. 



Helix spinulosa. Montagu^ p. 549. t. 11./. 10. 

 Teba spinulosa. Leach, Mollusc. jJ- 100. 

 Helix aculeata. Drap. p. 82. t. 7./. 10, 11. 

 Trochus terrestris. Pennant, p. 292. t. 83. f. 5. 

 Trochilus terrestris. Da Costa, p. 36. 



Shell about the tenth of an inch wide, and as much 

 high, thin, semitransparent brown horn-colour : the 

 volutions rounded and deeply separated, clothed 

 with a thin epidermis, which rises into numerous 

 regular rather oblique foliations shooting into 

 points, exhibiting the appearance of a circle of 

 bristles round the middle of each : aperture some- 

 what orbicular, as long as wide, with a white rib 

 on the inside : umbihcus moderately large and 



