HELIX. 



Plate CIX. 



Species 610. (Mus. Cuming.) 



lliiLix Sandvicensis. Eel. tedu uvibilicata, dkcoideu, 

 slriald, nitiduld, luieo-corned ; spird plana, suturd im- 

 pressd; anfractibus qtunque ad sex, lente uccrescenlihus, 

 ultimo depreaso, baai vix convex lore ; uml/ilico lalo, 

 dimidium fere diametri occupanle ; aperlurd parum 

 obliqud, lunari-rotundatd ; perktomate simpUci, recto, 

 tenui, margiuibm conniventibus. 



The Sandwich Helix. Shell umbilicated, discoid, stri- 

 ated, shining, yellowish-horny ; spire flat, suture im- 

 pressed ; whorls tivc to six, increasing slowly, the 

 last depressed, scarcely broader at the base ; umbili- 

 cus broad, occupying nearly half the diameter of the 

 shell ; aperture a little oblicpie, lunar-rounded ; lip 

 simple, straight, thin, margins approximatmg. 



PfEiFFEK, Pro. Zool. Soc. ISiy, p. 128. 



Hab. Sandwich Islands. 



S.n opake homy shell of nearly discoid growth. 



Species 611. (Fig. a, b, Mus. Cuuung.) 



Helix tiaiia. Eel. testa late etprofunde umbilicatd, de- 

 presse turbinatd, subrude oblique striata, flavicante, 

 alrigis fulguratis rufo-brmmeis onmtd ; anfractibus 

 quinque ad sex, convexis ; aperlurd lunato-circulari, 

 iabro simplici, tenui. 



The tuuban Helix. Shell broadly and deeply umbili- 

 cated, depressly turbinated, somewhat rudely obliquely 

 striated, yellowish, ornamented \vith red-brown zigzag 

 streaks ; whorls five to six, convex ; aperture lunar- 

 circular, lip simjilc, thin. 



Migiiels, Pro. Nat. Hist. Soc. Boston, U. S. 1845, p. 19. 



Hab. Sandwich Islands ; Jlighels. 



A conspicuously red-streaked shell, distinguished by a 

 very broad and deep umbilicus. 



Species 612. (Mus. Cuming.) 



Helix Powisiana. Eel. testa imperforatd, deprestd, 

 superne convexiusculd, basi planiitsculd, medio impressd, 

 tenuissimu, slriatuld, nilidissimd, corned ; anfractibus 

 plaiii involutis, ultimo antice oblique depresso ; aper- 

 lurd depressd, lunato-oblonyd ; peristomate simplici, 

 recto, marginibus utrinqite centra testa iutertis, dextro 

 antronum arcuato-dilatato. 



June, 



Powis's Helix. Shell imperforated, depressed, ralln-r 

 convex at the upper part, rather flattened at the base, 

 impressed in the middle, verj" thin, finely striated, 

 very shining, horny ; whorls involuted upon the same 

 plane, the last obliquely depressed in front ; aperture 

 depressed, luiinr-oblong; lip simple, straight, margins 

 inserted in the centre of the shell on citiier side, right 

 margin arcuatcly dilated in front. 



Pfeipfek, Mon. Helic. ^nv. vol. i. p. 34. 



Helix incoluta, Pfuifl"er (in Pro. Zool. Soc. 1845). 



Hab. Uuendeu, New Granada. 



A bright transparent horny shell, in which the whorls 

 iire involuted one into the other after the manner of Xau- 

 liltts. 



Species 613. (Fig. a, 4, Mus. Cuming.) 



Helix Vitrina. Eel. testa late umbilicata, deprestii, 

 subdiscoided, striatuld, nitidinsimn, pellucidd, comeo- 

 lutescente ; spird plana, subexcarmtd ; anfractibus qua- 

 tuor, concexiusculis, rap'ule accrescent iius, ultimo latv. 

 depresso, peripherid rotumlatd, antice nan detcendimie ; 

 aperlurd lunato-rotundald ; peritliimate simplici, aeuto, 

 margine supero anlrorsum nrcuato, columettari hoh 

 rejlexo. 



The Vitkina Helix. Shell broadly umbilicntcd, de- 

 pressed, nearly discoid, finely striated, vcr>' shining, 

 transparent, homy-yellow ; spire flat, a little exca- 

 vated ; whorls four, rather convex, increasing mpidly, 

 last whorl broad, de])ressed, rounded at the (n'riplier., 

 not descending in front ; aperture lunar-rounded ; lip 

 simple, sharp, upper margin arched in front, columel- 

 lar margin not reflected. 



Wagner, in Si)ixTest. Brns. p. 25. 

 Eelix circumplexa, Fi'nissac. 

 Solarium imperforatum, Spix. 

 Testa junior Helix nana, Wagner. 

 Solarium pygmitum, Spix. 



Hab. South Brazil. 



Of thin bright transparent homy texture, convoluted in 



a manner neju'ly discoid. 



Species 614. (Mus. Cuming.) 

 Helix L.vvahdi. Uet. lestd vit umbilicatd, eomeo-turbi- 

 1852. 



