HELIX 



Plate XCU. 



Species 498. (Mus. Cuming.) 



Helix tortilabia. Hel. testa umbilkatd, suhorbicutari, 

 discoided,Jlavido-alM, tinicolore vel/iilvo-fasciald, apice 

 et peril/ornate interdnm rosacids ; apird plana ; anj'rac- 

 li/jits quatuor ad quiitque, coHvexiusciilis, ultimo suL- 

 depresso, antice paritm dejlexo, mtpenie gibboso-crktato, 

 iiiferne comlrlcto ; umbilico mediocri ; aperlurd per- 

 obliqud, rottmdato-lunari ; peristomate rejiexo, mar- 

 gbiibm connivenlibus. 



TuE TWISTED LIP Helix. Shell umbilicated, suborbi- 

 cular, discoid, ydlowish-white or fulvous-banded, lip 

 and apex sometimes pink ; spire flat ; whorls four to 

 five, ratlicr convex, the last somcnvhat depressed, but 

 little deflected in front, gibbousiy crested at the upper 

 part, drawn in at the lower; umbilicus middling; 

 aperture very oblique, rotundately lunar ; lip reflected, 

 margins approximating. 



Lesson, Zool. Voy. de la Co(iuille, p. 311. pi. 13. f. 1. 

 Eadem var. Jfclix torlicolllx, Le (juillou. 



/fab. New Guinea ; Lesson. Amboyna ; Cuming. 



Curiously distinguished by a constriction of the lip, 

 whicli throws up a swoDen gibbous crest behind it. 



Species 499. (Mus. Cuming.) 



Helix kebra. Hel. tentd umbilkalu, suborbiculari, dis- 

 coided, albidd, aurantio-fusco undato-drigatd, circa 

 iimbiliciiM ii/imaculatd ; spird concavo-itnpressd ; an- 

 fraclihm quatuor ad qidnque, conveximculis, ultimo 

 gihbom, basi subcompreaso ; aperturd rotundato-lunari ; 

 periitomate iatii reJlexo, marginibus coiinivcntibus. 



The zebka Helix. Shell umbilicated, nearly orbicular, 

 discoid, whitisii, wave-streaked with orange-brown, 

 unspotted around the umbilicus ; spire concavely 

 impressed; whorls four to five, ratiier convex, the 

 last gibbous, rather compressed at the liase ; aperture 

 rotundately lunar ; lip broadly reflected, margins ap- 

 proximating. 



I'FEIFFEK, Zeitschrift fur Malac. 1850. p. 83. 



Hab. Moluccas. 



Of a contracted, gibbous growth, painted throughout, 

 except round the umbilicus, with close orange-brown 

 waved streaks. 



Species 500. (Pig. a, b, Mus. Cuming.) 



Helix colubek. Hel. le»td umiiticatd, orbiculalo-de- 

 preud, glabrd, albidd, macuUn corneii terialit ornatd ; 

 spird plami, medio subimmersd ; anfractibut quatuor ad 

 quinque, planiujiculit, rapidi accreicenlihuit, ultimo lata, 

 depresso, coatulato-striato, ad peripheriam rl mbtu* 

 rufo-:onato ; area columellari dilatatd, pallidi comeo- 

 zonatd, ad aperturam tupemi sulcata, basi coiutricto, 

 antice dejlexo ; aperturd perobliqud, lunari-elliptica ; 

 peristomate acuta, lati expaiuo, rejiexo, margine bamti 

 obsolete unidentato. 



The snake Helix. Shell umbilicated, orbicularly de- 

 pressed, smooth, whitish, ornamented with rows of 

 horny spots ; spire flat, slightly immersed in the mid- 

 dle; whorls four to five, rather flat, increasing ra- 

 pidly, the last broad, depresstd, rib-like striated, red- 

 zoned at and beneath the peripherj- ; columellar area 

 dilated, faintly horny-zoned, grooved at the upper 

 part next the aperture, constricted at the base, de- 

 flected in front ; aperture very oblique, lunar-elliptic ; 

 lip acute, broadly expanded and reflected, basal mar- 

 gin obsoletely one-toothed. 



Flanispira coluber. Beck, Index, p. 30. 

 Helix zonaria, tar., Chemnitz. 



Hab. Java. 



Distingiushed by its broad flattened dilated growth, ami 

 faint semi-transparent horny zone<< round the unibilieus. 

 The upper part of the shell is encircled by simple bands, 

 with, in some varieties, a row of arrow-headed spots next 

 the suture. 



Species 501. (Mus. Cuming.) 



Helix exceptiunccla. Hel. testa obtecti perjorald, de- 

 presso-globosd, glabrd, alia, Jasciii rufis <t HigriatHti- 

 bus varie cingulatd ; spird suielecatd, apice deprtud, 

 pkind ; aiijractibus quiiique, concexis, ultimo anticr in- 

 Jlato, ad aperturam peroblit/uam lunato-rotutidatam 

 subconstricto ; peristomate albo, teHui, lati refiexo, 

 marginibux coiiiiicrutiius, columellari inlut deutt pro- 

 viinente instructo. 



The little exception Helix. Shell with n co>cred 

 umbilicus, dcprcssly glol>ose, smooth, white, variously 

 encircled with red and bhiekish bands; spire mther 

 elevated, depressed and flat at the apex ; whorls fire, 

 eouvcx, the last inflated in front, rather constricted 



.\pril, 1852. 



