HELIX. 



Plate LX.WIIl. 



Species 409. (Mus. Cuming.) 



Helix oeientalis. Hel. testa minute umbilicata, orhi- 

 culari, utrinque convexd, supra Radioed, creberrime 

 striata, infra corned, Itevifjatd, politd, vix pellucitld ; 

 anfractibus septem, convexis, ultimo obtuse carinato ; 

 aperturd transversa lunari, labro simplici, introrsum 

 subincrassato. 



The orient.\l Helix. Shell minutely umbilicatcd, or- 

 bicular, convex on both sides, fawn-colour and very 

 closely striated above, horny, smooth, and polished 

 beneath, scarcely transparent ; whorls seven, convex, 

 the last obtusely keeled ; aperture transversely lunar, 

 lip simple, rather thickened inwardly. 



Gray, Annals of Philosophy, 1825, vol. ix. p. 412. 



Ud). East Indies? 



There is a characteristic contrast of colour in this 

 species, the upper surface being of a bright reddish-fawn 

 tint, densely striated, and the lower of a subtransparent 

 polished olive. 



Species 410. (Fig. a, b, Mus. Cuming.) 



Helix Boivixi. Hel. testa imperforatd, subtrochiformi, 

 oblique mimdissimi striata, nitiJd, albidd, fasciis niffro- 

 fuscis varii cinctd; spird conicd, acutiusculd ; anfrac- 

 tibus quinqtte, convexiusculis, ultimo antice descendente, 

 basi subplanato, dilute rufescente ; aperturd perobliqud, 

 luuato-otali ; columella perobliqud, lata, stricld, alba, 

 supra depresso-planulatd ; peristomale subincrassato, 

 brevissimi reflexo, albo, auraulio-marginato. 



Boivin's Helix. Shell imperforated, somewhat Trochus- 

 shaped, obliquely very minutely striated, shining, 

 whitish, variously encircled with black -brown bands ; 

 spire conical, rather sharp ; whorls five, rather convex, 

 last whorl descending in front, rather tlatteued at the 

 base, tinged with red ; aperture very oblique, lunar- 

 oval ; columella verj- oblique, broad, drawn out, white, 

 depressly flattened above ; lip rather thickened, very 

 shortly reflected, white, edged with orange. 



Petit, Revue zool. Soc. Cuv. 1841, p. 184. 



Ilai. Solomon's Islands. 



An exquisitely painted porcelain-like shell, very distinct 

 from any other species. 



Fig. 411. (Mus. Cuming.) 



For description of this species. Helix bittrialit, sec 

 PI. LXXXVl. The shell here figured has but one coloured 

 stria, and is Pfeifler's var. /3. Subsequently he described 

 it as a distinct species with the name //. Cet/lanica. 



Species 412. (Fig. a,b, Mus. Cuming.) 



Helix vittata. Ilel. tesld umbilicata, depresto-globota, 

 striata, albidd, fusco el luleo carii fatciatd ; tpird 

 brevi, apice sirpe nigricatile ; anfractibus quinque, pla- 

 nulatis, ultimo basi convexo, antice descendente ; aper- 

 turd lunato-ovali, intus cum fauce fusco-niffricante ; 

 peristomale hhiato, expanso, maryinibus connitentibui 

 callo junctis, columellari ditatalo, umbilicum lemiU- 

 gente. 



The filleted Helix. Shell umbilicatcd, depressly glo- 

 bose, striated, whitish, variously banded with brown 

 and yellow ; spire short, often blackish at the apex ; 

 whorls five, flattened, the last convex nt the base, 

 descending in front ; aperture hinar-ovnl, brown- 

 black; lip thickeued, expanded, margins approxi- 

 mating, joined by a callosity, coUimellur margin di- 

 lated, half-covering the umbilicus. 



MULLER, Hist. verm. terr. et fluv. vol. ii. p. 76. 

 Helix Spinola, Villa. 

 Helix zonula. Wood. 



Bab. Ceylon, JIalabar, iStc. 



Whatever may be the aliscncc or variety of painting on 

 the outer surface of this species, the inner is always 

 characterized by a ver\' rich dark chocolate-brown co- 

 louring. 



Species 413. (Mus. Cuming.) 



Helix Rivolii. Hel. tesld latissimi umbilicatd, oblongo- 

 discoided, peeuliariler compressd, suprme piano-con- 

 cava, coslato-itriatd, rufo-olicaced, subluM Urrigntd, hi- 

 lidd; aufractibus quinque, rulundalis, uUimu paulmlum 

 descendente ; umbilico peramplo, pertpeclioo , oprrlmrd 

 pirrjl//iq"(i, 'ubquadrato, sitbliiifrformi ; perittomate 

 iiicnmoto, reflexo, mnnjinibus callo aliiJu, lamtUam 

 taiidam lutrantem emittenle, junctis. 



February, 1852. 



