HELIX.— Plate CR. 



niiite, ornamented nith three chestnut lines ; spire 

 short, obtuse ; whorls five, rather convex, the last 

 deseending in front ; aperture rotundatcly lunar ; lip 

 rather simple, wliitc, margins approximating, upper 

 margin expanded, basal reflected, columellar dilated, 

 not sufficient to conceal the umbilicus. 



D'Orbigny, Voyage dans I'Amdr. Merid. p. 242. pi. 25. 

 f. 9-11. 



Hab. Bolivia ; D'Orbigny. 



A semitransparent yellowish shell, encircled with three 

 conspicuous chestnut lines, of which the middle one is on 

 tlie periphery of the whorls. 



Species 578. (Mus. Cuming.) 



Helix Estella. Eel. testa umiilicatd, glohuloso-de- 

 pressd, tenui, diapliand, irregulariter malleatd, brun- 

 iK'j-Jlavicante vel oUvaced, /ascid unicd ru/o-bninned 

 ornatd ; spird brevi, apice obtusd, bruniicd ; anfracti- 

 bits quatuor, contexts, ultimo anlice dejlexo ; aperlurd 

 luiMlo-suhcirculari ; peristomate reflexo, alba, marguie 

 columellari dilatato, appresso, umbilicum fere occul- 

 tante. 



The Estella Helix. Shell umbilicated, globularly 

 depressed, thin, diaphanous, irregularly indented, 

 brownish-yellow or olive, ornamented with a single 

 red-brown baud ; spire short, obtuse at the apex ; 

 whorls four, convex, the last deflected in front ; aper- 

 ture luiiately circular ; lip reflected, white, columellar 

 margin dilated, appressed, almost concealing the um- 

 bUicus. 



D'Orbigny, Voy. dans I'Amer. M6id. p. 241. pi. 25. 

 f. 5-8. 



Hab. Bolivia ; D'Orbigny. 



The surface of this species is peculiarly closely indented 

 throughout. 



olivaceo-fiucd, corned ; tpirS bretiler elevaid, eonoided ; 

 aiifractibus sex, coiwexiusculis, ultimo ad futiiratu cat- 

 taneo-marginatu, tentroso ; unibilico mediocri, pervio ; 

 uperturd vix obliqud, ampld, rotundato-lunari, inltu 

 iridesceiite ; peristomate simplici, acuio, margiitibiu 

 callo tenuissimu junctis. 



Gkifpith's Helix. Shell umbilicated, globoscly de- 

 pressed, rather solid, smooth, finely striated at the 

 upper part, olive-brown, horny ; spire a little raised, 

 conoid ; whorls six, ratiier convex, the last ventricose 

 and edged with chestnut at the suture ; umbilicus 

 middling, open ; aperture a little obli(iue, large, ro- 

 tundatcly lunar, iridescent within ; lip simple, sharp, 

 margins joined by a vcrj' tliin callosity. 



Pfeiffek, Pro. Zool. Soc. 1845, p. 127. 



Hab. ? 



A dark horny species of solid growth, convoluted much 

 after the manner of a Cyclostoina. 



Species 579. (Mus. Cuming.) 



Helix Griffitiii. Eel. testd umbilicatd, globoso-de- 

 pressd, solidiusculd, lavigatd, siiperiii leviter striatuld. 



Species 580. (Mus. Cuming.) 



Helix strobilus. Eel. testd imperforatd, conico-globosd, 

 oblique striatd, nitidd, nigricanle-castaned, interdum 

 ciiigulo lata fmco circumdatd, circa columellam area 

 Jluvd ; aiifractibus quinque ad sex, concexis, ultimo 

 basi planulatu, antice deflexo ; aperlurd lunaio-otali ; 

 colmnelld latd, alhd, intranle, excavatd ; peristomate 

 alba, reflexo, margine columellari declici. 



TuE riNE-APPLE Helix. Shell imperforated, conically 

 globose, obliquely striated, shining, dark chestnut, 

 sometimes encircled with a broad brown band, co- 

 lumellar area yellowish ; whorls five to six, convex, 

 the last flattened at the base, deflected in front ; 

 aperture lunar-oval ; colimiella broad, white, enter- 

 ing, excavated ; lip white, reflected, columellar mar- 

 gin slanting. 



Ferussac, Hist. Moll. pi. 103. f. 1. 

 An eadcm var. Helix mamilla, Lea. 



Hab. Guatemala. 



A very dark reddish-chestnut shell of solid growth, 

 concavcly hollowed about the columella. 



