HELIX. 



Plate CLXXIl. 



Species 11 GO. (Mus. Benson.) 



Helix c.^stea. Hel. teM nuLampliter wnbiUcatd, de- 

 prem^mo-cotticd, ienui, exilUer oblique acutostria- 

 tuld, corned; apird ad apicem oblusd ; suturit martji- 

 naiis ; anfraclibus quinque ad sex, planulatii, ultimo 

 ad peripheriam acidissime cariualo, aublus planiusculo; 

 aperlurd oblique iubqtiadraid, nuirgine aeulo. 



The camp Helix. Shell rather largely umbilicated, very 

 depressly eonical, thin, finely obli(iuely sharply stri- 

 ated, homy ; spire obtuse at the apex ; sutures mar- 

 gined ; whorls five to six, a little flattened, the last 

 very sharply keeled at the periphery-, rather flattened 

 beneath; aperture obliquely subcjuadratc, margin 

 acute. 



Benson, Ann. and Mag. Nat. Hist. 1852, vol. x. p. 349. 



Hob. Darjeeling, Sikkira Himalaya ; Trotter. 



A flattened horny &^rJMM-like species, rather largely 

 umbilicated. 



Species 1161. (Fig. a, b, Mus. Benson.) 



Helix lychnia. Eel. testa imperforald, valde depresso- 

 conicd, Ienui, tranalucenle, polild, fused ; spird conicd, 

 obtusiusculd ; suiuris marginatii ; anfraclibus sex ad 

 septeni, angustis, planiusculis, ultimo vix latiore, ad 

 periplieriam acute compresso-carinato, aublus convexius- 

 culo, medio excavalo ; aperlurd vix obliqud, anguntd, 

 securiformi ; peristomate simplici, aculo, margine in- 

 feriore arcualo, versus periomphalum leviler iiicrassato. 



The candlestick Helix. Shell imperforated, very de- 

 pressly conic, thin, translucent, polished, brown ; 

 spire conical, rather obtuse; sutures margined; 

 whorls six to seven, narrow, rather flat, the last 

 scarcely broader than the rest, sharply compressly 

 keeled at the periphery, rather convex beneath, ex- 

 cavated in the middle ; aperture a little oblique, nar- 

 row, hatchet-shaped ; lip simple, sharp, lower margin 

 arched, slightly thickened towards the seat of the 

 umbilicus. 



Benson, Ann. and 5[ag. Nut. Hist. 1852, vol. x. p. 310. 



Hab. Singapore; Dr. Bacon. 



Of the same typical form as the preceding species, but 

 not umbilicated. 



Species 1162. (Mus. Benson.) 



Helix plectilis. Ilel. letld obtecle umiilicald, tenui- 

 culd, globoid, caruUscente-albd, opacd, undique pecu- 

 liariter crispalo-corrugatd ; spird concexd ; anfractibtu 

 quatuor, subrotundalis ; aperlurd circulari ; periito- 

 mate expaiuo, super umiilicuin plus minus diUUato, 

 marginibus callosilate planatdjunctis. 



The ckimplf.d Helix. Shell with a covered umbilicus, 

 rather thin, globose, bluish-white, opake, jx;culiarly 

 crisply puckered throughout ; spire conTcx ; whorls 

 four, rather rounded ; ajierturc circular ; lip ex- 

 panded, more or less dilated over the umbilicus, 

 margins joined by a flattened callosity. 



Benson, Ann. and !Mag. 1853, vol. xi. p. 29. 



Hab. Shark's Bay, West Australia. 



The crumpled sculpture of this species is quite distioct 

 rom anvthinsr prenouslv known. 



Ihe crumpled sculpture 

 from anything prenously 



Species 1163. (ilus. Benson.) 



Helix vesicula. Ilel. testa um&ilicald, conoidro-de- 

 pressd, tenui, sublceoigatd, nilidd, traHsluemie, paliide 

 corned; spird brevi, conoideS, apice acuminatd ; »«- 

 turd profundd ; anfraclibus sex, ultimo rotundalo, nan 

 descendente, basi concexo ; aperlurd subterticali, tu- 

 nato-rotundatd ; peristomate simplici, acuta, margine 

 columellari terticali, mi umbilicum in laminam brerrm 

 triangularem rejlexo. 



The little bladder Helix. Shell umbilicated, «>- 

 noidly depressed, thin, rather smooth, shining, trans- 

 lucent, pale horny ; spire short, conoid, acuminated at 

 the apex ; suture deep ; whorls six, the last rounded, 

 not descending, convex at the base ; aperture sub- 

 vertical, lunar-rounded ; lip simple, sharp, columcl- 

 lar margin vertical, reflected at the umbilicus into a 

 short triangular lamina. 



Benson, Jourii. Asiatic Soc. vol. vii. p. 216. 



Uab. Sotee-Durga and llajmohal, Bengal; Benson. 



llie apex is sometimes dork brown, with a little brown 

 in the suture. 



Species 1164. (Mus. Benson.) 

 Helix lecvtuis. Ilel, Ustd tubumbUicali, conoidto-dt- 



October, 1833. 



