HELIX. 



Plate CXXVI. 



Species 754. (Mus. Cuming.) 



Helix Lessoxi. Ilel. testa obtedi ttmbUicata, ffloMoaa, 

 minute itriatula, aoliduld, nu/ricanle-castaned, apicem 

 versus pallidiore ; spird oltusd ; anfractihus sex, vix 

 convexiuiculis, ultimo iujlalo, antics defiexo ; aperturd 

 lunato-roturtdatd, intus lilaced ; peri^tomate undique 

 expanso, albo, margine columellari supemi perdUatato, 

 umlAlicum tegente. 



Lesson's Helix. Shell with a covered umbilicus, 

 globular, minutely finely striated, rather solid, 

 blackish-chestnut, paler towards the apex ; spire ob- 

 tuse ; whorls six, slightly convex, last whorl inflated, 

 deflected in front ; aperture lunar-rounded, lilac 

 within ; lip expanded tliroughout, white, columellar 

 margin very broadly dilated at the upper part, cover- 

 ing the umbilicus. 



Pfeiffeb, Symbola, vol. iii. p. 71. 



Helix Rangii, Lesson (not of Ferussac). 



Hah. Australia. 



A very dark chestnut sheU, with a somewhat livid pur- 

 plish hue. 



Species 755. (Mus. Cuming.) 



Helix Gk.iyi. Hel. testd oltecli um/nlicatd, nubghbosd, 

 tenui, corned, fascia purpureo-rufd ad suturam et circa 

 umiilicum ornatd; spird breviusculd, suturd impressd ; 

 anfractihus quinque ad sex, convexis, minute granulatis, 

 plicato-striatut, striis apicem versus costellatis, anfractu 

 ultimo rotundatd ; aperturd lunari ; peristomate tenui, 

 reflexiusculo, roseo-labiato, margine columellari purpu- 

 reo-nifo, perdilatato, umhilicum fere tegente. 



Gr.^t's Helix. Shell with a covered umbilicus, sub- 

 globose, thin, homy, ornamented on the suture 

 and around the umbilicus with a purple-red band ; 

 spire rather short, with the suture impressed ; whorls 

 five to six, convex, minutely granulated, plieately 

 striated, striae towards the iipex rib-like, last whorl 

 rounded ; aperture lunar ; lip thin, pink-edged, 

 slightly reflected, columellar margin very broadly di- 

 lated, almost covering the umbilicus. 



Pfeiffeb, Symbolae, vol. iii. p. 68. Mon. Hel. viv. vol. 

 i. p. 134. 



Hab. Eastern Australia. 



A globose yellowish homy shell, of rather solid growth, 



encircled next the suture and around the umbilicus with u 

 dark purple-red band. 



Species 756. (Mus. Cuming.) 



Helix Ddnkiensis. Hel. testa prof undi umiilieala, de- 

 presso-gtobotd, svperni rude plicato-slriatd et mimuU 

 granulatd, suitut Ueviore, polild, sordidi oUvaced ; a»- 

 fractibus sex, coHtexis ; aperturd subcircutari ; peristo- 

 mate tenui, expanse, paruin rejiexo, margimibm* ammi- 

 ventihus. 



The DLTiK Island Helix. Shell deeply umbilicated, 

 depressly globose, rudely plieately striated and mi- 

 nutely granulated at the upper part, smooth and 

 polished at the lower ; whorls six, convex ; aperture 

 nearly circular; lip thin, expanded, but little re- 

 flected, margins approximating. 



FoEBEs, Moll. Voyage of H.M.S. Rattlesnake, Appen- 

 dix, p. 378, pi. 2, f. 7, a, b. 



Hab. Dunk Island, north-east coast of .\ustralia. 



This is also an olive horay-like species, but of mon- 

 solid growth than the preceding, the interior of the aper- 

 ture being lined with a thin whitish callous layer. 



Species 757. C^^us. Cuming.) 



Heux IMPEB.1T0R. Hel. tfita obtecti umbilieald, deprtfd. 

 carinatd, oblique rugosa et striata, fused, ad carimam 

 pallide fasciatd ; aifractiliu* quinque, plamitueulis , 

 aperturd lunato-rotunilatd ; peristomate toltH incra*- 

 sato, calloto, reftexo, albo, intus dentibu* septem imnput- 

 libus obtwns instructo, marginibus perdilatatu, eallo 

 junctis. 



The ejipebob Helix. SheU with a covered umbilicus, 

 depressed, keeled, obliquely wrinkled and striated, 

 brown, faintly banded at the keel ; whoris five, rather 

 flat; aperture lunar-rounded; lip very much thick- 

 ened, callous, reflected, white, furnished within with 

 seven obtuse unequal teeth, margins broadly dilated, 

 joined by a callous layer. 



Polydontes imperalor, De Montford, Conch. Sysl. vol. ii. 

 p. 155. pi. 39. 



Helix imperator, Ferussac. 



Hab. Cuba. 



Of this extremely rare species, tuc ^pecmlen bin- tiiruml, 



August, 1852. 



