HELIX. 



Plate XLIX. 



Species 230. (Mus. Cuming.) 



Helix angulata. Hel. testa imperforatd, depresm, su- 

 peme planiuiculd, ad periplieriam valde turgidd, acute 

 carinatd, obliqui striata, undique albidd ; aufractibics 

 qualuor, planulalis, rapide accrescentibus, ultimo per- 

 injlatu, juxia columellam declivem stnctiusculam sub- 

 compresso ; aperturd subrhombed ; peristoniate subin- 

 crassato, hreviter rejlexo. 



The angled Heli.x. Shell imperforated, depressed, 

 rather flattened at the upper part, very much 

 swollen and sharply keeled at the periphery, ob- 

 liquely striated, white throughout ; whorls four, flat- 

 tened, enlarging rapidly, last whorl much inflated, 

 slanting towards the columella, which is drawn out 

 and a little compressed ; aperture subrhomboid ; lip 

 rather thickened, shghtly reflected. 



Fekussac, Hist. Moll. pi. Gl. f. 2. 

 Helix inflata, Deshayes. 

 Caracolla iiijlaia, Lamarck. 

 Caracolla angulata. Gray. 



Uab. Porto Rico. 



Of a peculiar parachute-like form, the angled periphery 

 of the last whorl being nearly on a plane with the spire, 

 from the circumference of which the shell is attenuated 

 gradually to the base of the columella. 



Species 231. (Fig. a, b, Mus. Cuming.) 



Helix oblitehata. Eel. testa imperforatd, orbicuhtd, 

 carinatd, supra suico/iicd, siibtm valde turgidd, granu- 

 losa, sub epidermide fuscescente albicante ; aiifractibua 

 qualuor, subplaiiulati-'i ; columelld alhd, leviter ar- 

 cuatd ; aperturd augulato-lunari ; peristomale subin- 

 crassato, breviter re/lexo, margine dilatato, calloso. 



The worn Helix. Shell imperforated, orbicular, keeled, 

 slightly conical at the upper part, much swollen 

 beneath, granular, whitish beneath a light brown 

 epidermis ; whorls foiu-, rather flattened ; columella 

 white, slightly arched ; aperture angularly lunar ; lij) 

 rather thickened, shortly reflected, margin dilated, 

 callous. 



Ferussac, Hist. Moll. pi. 61. f. 3. 



Hab. Porto Rico. 



The name given to tliis species by Fenissae can only 

 apply to a specimen in bad condition. The shell here re- 



presented, from Mr. Cuming's collection, is covered with 

 a fine fresh obliquely streaked epidermis. 



Species 232. (Mus. Cuming.) 



Helix JaMAICENSIS. Eel. testd imperforatd, subglobosd, 

 striis incremeiiti obaoletis Uneinque impress obliquii 

 confertimmis subreticulatd, rufo-cattaiied, alio-ronald ; 

 spird parculd, breci, obtusd; suturd lineari ; anfrac- 

 libus tribus ad qualuor, summit planis, ultimo per- 

 magno, inflato ; aperturd lunato-ovali ; periitomate 

 incrassato, expanse, marginibus callo teiiui junctis. 



The Jamaica Helix. Shell imperforated, sub^lobosc, 

 faintly reticulated with obsolete striae of growth and 

 very close-set oblique impressed lines, reddish chest- 

 nut, zoned with white; spire rather small, short, 

 obtuse; suture linear; whorls three to four, the 

 U])i)crmost flat, the last very large, inflated; aperture 

 Innately oval ; lij) thickened, expanded, margins 

 joined by a thin callosity. 



Chemnitz, Conch. Cab. vol. xi. p. 115. pi. 12'J. f. lllO-l. 



JIab. Jamaica. 



Tliis wcU-known species stands out very conspicuously 

 among the Helices of Jamaica, as being the only re- 

 presentative of a type, remarkable in its locahty for form 

 and size. 



Species 233. (Mus. Cuming.) 



Helix cepa. Hel. testd imperforatd, depres»o-globo»d, ob- 

 lique irregulariter rugoso-striatd, rufd, pallidi fa»- 

 ciatd; spird brevi ; suturd laci ; anfractibiu quatuor 

 ad quinque, convexiusculis, ultimo subcarinato, JHxta 

 aperturam a latere compresso, sulcoque elouga/o, intu* 

 plicam validam formanle, inslructo ; aperturd luHari ; 

 peristomale expanso, marginibus callo junctii, batali 

 late calloso, uuidentato. 



The onion Helix. Shell imperforated, deprcssiy glo- 

 bose, obli(|uely irregularly rugoscly striated, red, 

 faintly banded ; spire short ; suture smooth ; whorb 

 four to live, shghtly convex, the last faintly kcdcd, 

 compressed at the side next the aperture, furnished 

 with an elongated groove forming n strong fold in- 

 ternally ; aperture lunar; lip expanded, margins 

 joined bv a callosity, basjJ margin broadly colloun. 

 one-toothed. 



October, 1851. 



