HELIX. 



Plate CCIX. 



Species 1477. (Coll. D'Orbigny in Mus. Brit.) 



Helix uounob.-exa. IM. leda siibampliter profunde 

 umbiUcata, depream-conoided, diapham, lacitjatd, al- 

 fiidd; an/racdliKs sex, decUvi-convexU ; aperlurd ob- 

 Uqm lunari, labro hicramaio, sitbexpanso. 



The hill Helix. Sbell rather largely deeply umbili- 

 catcd, dcprcssly conoid, diaphanous, smooth, whitish ; 

 whorls six, slantingly convex ; aperture obli(iucly 

 lunar, lip tliickciud, slightly expanded. 



D'Orbigny, Voy. dans i'^Vmer. Merid. p. 253. pi. 28. 

 f. 17 to 20. 



Hab. San Jose de Chiquitos, Bolivia. 



Of transparent, almost glassy texture, clear and shining. 



Fig. 1178. (CoU. D'Orbigny in Mus. Brit.) 



The shell here figured is the typical specimen of D'Or- 

 bigny's //. octheph'da, referred subsequently by him, as a 

 variety, to //. Iiylephila, Species 1482. 



Species 1479. (Coll. D'Orbigny in Mus. Brit.) 



Melix Pahaguayana. Hel. testa vix undiUicatd, orbi- 

 culari, elevatd, lat'ujatd, teniti, diapliand ; npird co- 

 tticd, apice obtiisd; aiifractiljtis sex, coiivexis ; aper- 

 lurd depressd, rotundalo-lunari, labro subincrassato, 

 albo. 



The Paraguay Helix. Shell scarcely umbilicated, or- 

 bicular, raised, smooth, thin, diaphanous ; spire coni- 

 cal, obtuse at the apex ; whorls six, convex ; aperture 

 depressed, rotundately lunar, lip rather thick, white. 



Helix elevata, D'Orbigny (not of Say), Voy. dans I'Amer. 

 Mdrid. p. 254. pi. 28. f. 5 to 8. 

 Helix Paraguayana, Pfciffcr. 



Hai. Paraguay, near Jlontcvideo. 



A light subglobose shell, of diaphanous colourless tex- 

 ture. 



umbilicated, deprcssly orbicular, discoid, sub-inflated, 



thin, diaphanous, whitish, smooth ; spire small ; 



whorls six, rounded ; aperture circular, lip thin, 



scarcely expanded. 

 D'Orbigny, Voy. dans I'AmJr. Mt'rid. p. 249. pi. 27. f. 4 



to 7. 

 Hab. Bolivian Andes, between Moros and Cochabamba. 



Deeply perspectively umbilicated, much flattened at the 

 spire. 



Species 1481. (Coll. D'Orbigny in Mus. Brit.) 



Helix cualicophila. Hel. testa ampliler perspectitx 

 iimbilicatd, orbiculari-depressd, lacigald, teniii, teniii- 

 striald, diapliand, griieo-corned ; spird oblusd ; aii- 

 fraclibiis sex, decliei-coiwexis ; aperturd oblique lunari, 

 labro simplici. 



The stone-lovino Helix. Shell largely perspectively 

 umbilicated, orbicularly depressed, smooth, thiu, 

 finely striated, diaphanous, greyish-horny ; spire ob- 

 tuse ; whorls sLx, slantingly convex ; aperture ob- 

 liquely lunar, lip simple. 



D'Orbigny, Voy. dans VAxair. Merid. p. 251. pi. 27. f. 8 

 to 11. 



Hai. Chiquitos, Bolivia. 



Allied to the preceding, but more broadly umbilicated, 

 and less flattened at the spire. 



Species 1480. (CoU. D'Orbigny in Mus. Brit.) 



Helix skiaphila. Hel. lextd siibampliter aperii iimbi- 

 licatd, depresso-orbiculari, discoided, suiiiijlald, ttmui, 

 diap/iaiid, albidd, Incignld ; spird pared ; nii/ractiiiis 

 sex, rutundatis ; aperturd cirrii/ari, labro lenui, vix 

 expanao. 



The shade-loving Helix. Shell rather hirgely openly 



December 



Species 1482. (Coll. D'Orbigny in Mus. Brit.) 



Helix uylephila. Hel. testd mtdiocriter iimiilicatd, 

 orbiculato-conoided, diapliand, albidd, striatd, siibtus 

 larigatd, liiridd ; anfractibiis sex, concexo-ilectiribHS ; 

 aperturd rolundato-liiiiari, obliqud, labro subincraasalo. 



The wood-loving Helix. Shell moderately umbili- 

 cated, orbicidarly conoid, diaphanous, whitish, stri- 

 ated, smooth beneath, clear; whorls six, convcxiy 

 slanting ; aperture rotundately lunar, oblique, lip 

 rather thickened. 



D'Orbigny, Voy. dans TAmer. Merid. p. 253. pi. 28. f. H 

 to IC. 

 Eadcui var. //. octhephila, D'Orbigny. 



Hab. Chiquitos, Bolivia. 



Of the same typical form as H. tlriaphila, more conically 

 convoluted. 



IS.Vl. 



