HELIX —Plate CXL. 



deflected iu front ; aperture nearly circular ; lip sim- 

 ple, slightly edged within, margins joined by a cal- 

 losity. 



LowK. Faun. Mader. p. 48. pi. .5. f. 21. 



Hub. Ishind.'; ol' Porto Santo and Baxo, Madeiras. 



Of an ash tinge, the lip of the circular aperture being 

 yellowish-brown. 



Species 893. (Mus. Cuming.) 



Helix Despre.\cxii. Hel. testa tmibilicatd, acuH conicd, 

 Trochifonni, hasi convexitinctdd, rmjmn-tuhprculatd, 

 calcared, albd, acute carinatd ; nnfractihus quinque, 

 exsertU, bicariiiatis ; carinis deniatoserratis, inferiore 

 maffis prominente ; aperiiird perobliqitd, depresm, ellip- 

 licd, intiis fuscUluld ; perislomate simplici, recto, mar- 



ijinJjM fere contuftm, ratio tenui junctu, columellari 

 reflexo, umbilicum amjmlumfere occultante. 



Despre.\ux's Helix. Shell umbilicated, sharply coni- 

 cal, Trochus-shaped, rather convex at the base, ru- 

 gosely tubercied, chalky, white, sharply keeled; 

 whorls live, exsertcd, two-keeled ; keels dcntately 

 serrated, the lower the more prominent . ap«-rture 

 very oblique, depressed, elliptic, brown within ; lip 

 simple, straight, with the margins nearly contiguous, 

 joined by a thin callosity, coluniellar margin re- 

 flected, almost covering the narrow umbilicus. 



D'Orbigny, Moll. Isles Canaries, p. 65. pi. 3. f. 21-2:i. 



Ilab. Island of Fuerteventura, Canaries. 



A very characteristically sculptured Trochus-like species, 

 of chalk-white substance, stained in the mouth with dark 



chestnut. 



