HELIX. 



Plate LIX. 



Species 289. (Fig. a to rf, Mus. Cumiug.) 



Helix Tuosciieli. Hel. teslii nmlilicatd, ybbum-depressd, 

 conferdm codulato-driatd, coloriLm pervariabili ; spird 

 siiielecald, oblusd; anfractibm quatuor ad quinque, 

 convexiusciilis, ultimo vix descendente ; aperturd ob- 

 liqud, lunaio-nubcirculari ; perMomate acuta, intus 

 calloso, erpanso, marginibus subconniventibus, colii- 

 mellari dilatato, reflexo, mtibiUcum semioccultante. 



Tuoschel's Hellx. Shell umbilicated, globoscly de- 

 pressed, closely rib-like striated, extremely variable 

 in colour; spire somewhat raised, obtuse; whorls 

 four to five, rather convex, the last scarcely descend- 

 ing ; aperture oblique. Innately subcireular ; lip sharp, 

 callous within, expanded, with the margins approxi- 

 mating, columellar margin dilated, rcllccted, half- 

 covering tiie umbilicus. 



Pfeiffer, Symbols, vol. iii. p. 76. 



Hab. Cuba, Bermuda. 



Four specimens represented in the accompanying plate 



illustrate the principal varieties of colour aiid marking in 



tills species. 



Species 290. (Fig. a, b, Mus. Cuming.) 



Helix phjeogkamma. Eel. iestd obtede umbilicatd, or- 

 biculato-convexd, glabriuscidd, nilidd, Itneis late cas- 

 taneis supenw radiatd, bad caslaneo-imifasciatd ; aii- 

 fradibus quatuor ad quinque, vix convexiusculis, ultimo 

 obsolete aiujulato, basi planimculo ; aperturd perob- 

 liqud, rotundato-lunari ; perintomate intus castaneo- 

 labiato, marginibun connivenlibus, supero parum ex- 

 panse, basali dilatato, rejlexo, appresso. 



The dusky-marked Helix. Shell with a covered um- 

 bilicus, orbicularly convex, ratlier smooth, sliiiung, 

 rayed about the upper part with light chestnut lines, 

 encircled with a chestnut band at the base ; whorls 

 four to five, slightly convex, the last obsoletely an- 

 gled, rather Hat at tiic base ; aperture verj' oblique, 

 rotundately lunar ; lip chestnut-edged within, margins 

 approximatiTig, upper margin but little expanded, 

 basal margin dilated, reflected, appressed. 



Pfeiffer, Symbola;, vol. iii. p. 72. 



Uab. ? 



This approaches very closely to the preceding species, 



and may prove to be only a variety. 



Species 291. (Mus. Cuming.) 

 Helix Lindexi. Uel. testa imperforatd, semighbosd. 



tenui, irregulariter striatuld, supeme opaed, aUndd, 

 puncti-s castanets coriJ<persd el lined nigricante-cattaned 

 ad suturam omald ; anfractilnui quatuor ad quinque, 

 convexiusculis, ultimo basi planulato, pellucido, comeo- 

 mrente, antice breviter dejleio ; rotumelld intrante, 

 dectivi, miiarcuatd, dilatald, intrormm acuta; aper- 

 turd lunato-ellipticd ; perinlomate simplici, recto. 



Linden's Helix. Shell imperforated, scmiglobo«c, 

 thin, irrcgulariy finely striated, opake at the upper 

 part, whitish, spinkled with chestnut dots and orna- 

 mented at the suture with a blackish-chestnut line : 

 whorls four to five, rather convex, the last fiat, trans- 

 parent at the base, horny-greenish, shortly deflected 

 in front ; columella entering, slanting, slightly arched, 

 dilated, sharp inwardly ; aperture lunar-elliptical ; 

 lip simple, straight. 



Pfeiffer, Pro. Zool. Soe. 1846. 



Sab. Cuba. 



A very characteristic species, partly opake and partly 

 transparent greenish-white sprinkled with black dots, and 

 with a deep black line in the place of the suture. 



Species 292. (Fig. a, 6, c, Mus. Cuming.) 



Helix gilva. Uel. Iestd umbilicatd, ghboto-deprestd, 

 tenui, striis obliquis cornigotd, cameo-albidd, faaciii 

 angustis nigricantibus vet fuscis cingulatd ; »pird 

 parum eletatd, interdum obtimissimd ; a^fractibun 

 quatuor ad quinque, planiimaills, celeriter accrescenti- 

 bus ; aperturd rolundato-lunatd ; perislomate simplici, 

 acuto, margine dextro patulo, colwnellari late rtfiao, 

 roseo, intus nigro-pnrpurascenie. 



Tue flesh-cololkej) Helix. Shell umbilicati-d, glo- 

 boscly depressed, thin, wrinkled with close oblique 

 stria;, flesh-white, encircled with narrow brown and 

 blackish bands; spire but little raised, somclimcs 

 very obtuse ; whorls four to five, rather flat, in- 

 creasing C|uickly ; aperture rotundately lunar ; lip 

 simple, sharp, right edge ejfuscd, columcllnr edge 

 broadly reflected, jiinkish, blackish-purple within. 



FERL-ssAC.Hist. Moll. pi. 21 B. f. 1. 

 Helix corrugata, Pfcifl'er. 



Eab. Cuba. 



This species varies in colo\ir and marking aflrr the 

 manner of //. Trosc/ieli, from which it differs constantly 

 in form. 



December, 1851. 



