HELIX.— Plate XCVIIl. 



Helix magnifica, Lea. 

 Hah. New Granada ; Gibbon. 



This species is tUways larger in size than any other of 

 the group collected in this Plate. 



Species 540. (Mus. Cuming.) 



Helix Aedouini. Hel. tesld profundi umbilicald, orbi- 

 culatu-depreisd, siibobscure ruguloso-plicald et nuilleatd, 

 Jlavo-olivaced, :onii aiigtutUi tribus nigricaiUibm cint/ii- 

 lald ; »pird plano-convexd, apice oblusd ; anfractibus 

 quinqtte, planula/in, ullimo ad peripheriam obtumsime 

 cariuald ; aperlurd transverse ovali ; perMomate re- 

 Jlexo, calloso, alio, maryinibus conniventibus, callo 

 ladeo junctis. 



Akdodin's Helix. Shell deeply umbilicated, orbicu- 

 larly depressed, somewhat obscurely rugulosely pli- 

 cated and indented, yellowish-olive, encircled with 

 three blackish zones ; spire flatly convex, obtuse at 

 the apex ; whorls five, rather flattened, the last very 

 obtusely keeled ; aperture transversely oval ; lip re- 

 flected, callous, white, margins approximating, joined 

 by a milk-white callous layer. 



U'Orbig.ny, Voyage dans I'jVmer. Merid. Moll. p. 239. 

 pi. 24. f. 4-'6. 

 Eadem var. Helix orexigaia, D'Orbigny. 



Hab. Prorince of Yungas, Bolivia ; D'Orbigny. 



This fine species is of the same peculiar typical form as 

 the European H. trhona and Poinohi. The lip is more 

 callous and reflected than in either. 



Species 541. (Mus. Cuming.) 



Helix polygyrata. Hel. testd latmime umbilicald, dis- 

 coided, supemi planiasimd, aublits eicavatd, solidd, 

 atriatd, lineii minulLa concenlricis subdecussald, oli- 

 vaced, conis lalim7ni.i nigricante-rujis mipernu circmn- 

 dald ; avfractibus iwvem, convexis, peraiigiwiis, ultimo 

 anlice descendente ; aperlurd perobliqud, lunalo-rotnn- 

 datd ; peristoma te albo, breviier rejlexo, marginibiis 

 callo junctis. 



TuE many-whoeled Helix. Shell very broadly um- 



bilicated, discoid, very flat at the upper part, liollowed 

 beneath, solid, striated, faintly decussated with mi- 

 nute concentric lines, olive, encircled at the upper 

 part with ver)' broad black-red zones ; whorls nine, 

 convex, very narrow, the Ust descending in front ; 

 aperture very oblique, lunar-rounded ; lip white, 

 shortly reflected, margins joined by a callous layer. 



Born, Test. Mus. Vindobonensis, p. 373. pi. 14. f. 19, 20. 



Hab. Brazil. 



This well-known species is remarkably characterized h\ 

 its peculiarly discoid PlanorbinAAic form. 



Species 542. (Mus. Cuming.) 



Helix pellis-serpentis. Hel. testd angutti umbilicald, 

 tumido-globosd, supeme confertissime granulosa, ba»i 

 striata, griseo-Jlavicante, fasciis latis albo- et rufo- 

 Jlammulatis, siibtus ciiigulis angustis interrnptit rufis 

 oriiatd ; aii/ractibus sex, concexiusculis, ultimo obsolete 

 angulato, latere apertura opposito impressionibus pro- 

 fundis indentato ; aperlurd late luiiari ; peristomate 

 intus albo, calloso, viarginibus callo junctis, supero ei- 

 panso, columellari et basali reflexis. 



The serpent's skin Helix. Shell umbibcutcd, swollen 

 globose, very closely granulated about the upper part, 

 striated at the base, greyish-yellow, ornamented with 

 broad white-and-red-flamed bands, beneath with nar- 

 row interrupted bands ; whorls six, rather convex, 

 the last obsoletely angled, indented with two deep 

 impressions in the side opposite to the aperture ; 

 aperture broadly lunar ; lip white within, callous, 

 margins joined by a callous layer, upper margin ex- 

 panded, coluniellar and basal margins reflected. 



Ciie.mnitz, Conch. Cnl). vol. ix. part 2. p. 79. pi. 125. 

 f. 1005-0, and vol. xi. p. 2r)S. pi. 208. f. 2046-7. 



Hab. Guyana. 



This is regarded by Dr. Pfeifl!'er as the tj-pical H. pellis- 

 serpentis, but there is no indication in either of Chemnitz's 

 figures of the curious indentations which appear to be 

 constant and so eminently characteristic in the species 

 under consideration. 



