HELIX.— Plate LI. 



broadly furrowed; aperture oblong-lunar, contracted; 



lip dilated, margins ajjproximaicd, basal margin 



broadlv reflected, appressed, thrce-tootlied within, 



teeth lamellar, entering. 

 Adams, Contributions to Conehology, No. 2. p. 30. 

 Ilab. Jamaica. 



This s])ccies is of a peculiarly globose form, with the 

 aperture contracted and the peristome unusually broadly 

 dilated. 



Species 245. (Mas. Cumiug.) 



Helix valida. Hel. tedd imperforatd, mhglohom, bmi 

 plnmdald, ad peripherimu tenuicarinald, uudique 

 minute granulatd et punctatd, riifo-castaned, zonuld 

 palUdd ciiKjulatd, basi pnllidd, virescente ; spird ob- 

 lu-id ; aiifractibuK (jitinque ad sex, nllimo antice deflexo 

 et scrobiailalo ; aperturd oblongo-lunari, valde dilatatd, 

 marffiiiibiis approximatis, callo tentti junctis, siipero di- 

 latato, bwiali calloso, late rejlexo, iiitiis quadridentalo. 



The stuoxg Helix. Shell imperforated, subglobose, 

 flattened at the base, finely keeled at the periphery, 

 minutely granulated and punctured throughout, red- 

 dish-chestnut, encircled with a pale zone, pale and 

 greenish at the l)ase ; spire obtuse ; whorls five to sLx, 

 the last deflected anteriorly and furrowed ; aperture 

 oblong-lunai', much dilated, inargins approximated, 

 joined by a thin callous layer, upper margin dilated, 

 basal margin callous, broadly reflected, four-toothed 

 within. 



.\i)AMS, Contributions to Conehology, No. .5. p. 77. 



Hub. Jamaica. 



.\ large robust sjiecies, chiefly distinguished by the pro- 

 longed dilated growth of the aperture. 



Species 246. (Fig. a, b, Mus. Adams.) 



Helix axomala. Ilel. tedd umbilicald, orbiculari, uu- 

 dique minute granulosa et punctatd, purpureo-cadaned, 

 carina tenui aWvcante ad peripherlam cingulatd; spird 

 olttusd ; anfraclibus qtiinque, convexis, ultimo basi ro- 

 lundato, antic!; rc/texo, quadri-scrnbiculato ; umbilico 

 prof undo, pervio ; aperturd Itorizontali, trigono-oblonyd, 

 margine integro, incrassato, calloso, cameo-fuaco, pecu- 



liariter elevaio, intus quadridentalo, deiitiius intranti- 

 bus, suioccullis. 



TiiE ANOMALOUS Helix. Shell umbilicated, orbicular, 

 minutely granulated and punctured throughout, 

 purple-chestnut, encircled at the periphery with a thin 

 whitish keel ; spire obtuse ; whorls five, convex, the 

 last rounded at the base, deflected in front, four-fur- 

 rowed ; umbilicus deep, open ; aperture horizontal, 

 triangidarly oblong, margin entire, thickened, cal- 

 lous, flesh-brown, peculiarly raised, four-toothed 

 within, teeth entering, nearly hidden. 



Adams, Contributions to Conehology, No. 9. p. 171. 



Hab. Jamaica. 



This species belongs to the same natural type as the 

 others of this plate, but is distinguished by a remarkable 

 pecidiarity in the aperture. Instead of the margin being 

 divided and spread in a Cidlous layer over the axis of the 

 whorls, it is entire and thickly elevated after the manner 

 of //. labijrinthus, leaving an open axial umbilicus. 



Species 247. (Mus. Cuming.) 



Helix consakguinea. Ilel. tesld nunc imperforatd, 

 nunc umbilicatd, orbiculari, solidd, suidepressd, uudique 

 granulosa et punctatd, ad peripheriani carind tenui 

 ftljformi cinctd; spird obtusd ; anfraclibus quinque, 

 convexis, nllimo antice deflexo, quadri-scrobiculato ; 

 aperturd Itorizontali, subdilatatd, marginibus callo tenui 

 junctis, supero parum rejlexo, basali reflexo, appresso, 

 intus quadridentalo, dentibus lamelUiribus, erectis. 



The allied Helix. Shell sometimes imperforated, 

 sometimes umbilicated, orbicular, solid, somewhat 

 depressed, granulated and punctured throughout, en- 

 circled at the periphery- with a thin ihread-like keel ; 

 spire obtuse ; whorls five, convex, the last deflected 

 in front, foitf-furrowcd ; aperture horizontal, some- 

 what dilated, margins joined by a thin callous layer, 

 upper margin but little reflected, basal margin re- 

 flected, appressed, four-toothed within, teeth lamel- 

 lar, erect. 



Adams, Contributions to Conehology, No. 9. p. 170- 



Hab. Jamaica. 



This is rather a doubtful species, intermediate between 

 JJ. valida and sinuata. 



