HELIX.— Plate XLI. 



Hab. Madagascar. 



Resembling the preceding species in form, but more 

 Icnticularly compressed and very sharply keeled. 



Species 186. (Fig. a, b, Mus. Cuming.) 



Helix globull's. Hel. lesld umiilicata, ffloboso-conoU/ea, 

 irregularUer cottuUth-tlriaid et malleatd, sordide alia, 

 molascente-cinereo nehulosa ; anfractibui ijiiiiujue, coii- 

 vexia, ultimo magna, injlalo, ruliindato ; uiubiUco aiigus- 

 to, temioblecto ; columellu lavi, mtbareuato ; aperturd 

 lunato-ocali, iiilus iiiluli violaceo-piirpured ; perMo- 

 male incrasialo, rejlexo, rubicumto, margiiiiiiui dis- 

 laiUUiui, callo diffum violaceo-purpureo juiictk, colu- 

 mellari dilatalo, rejlexo. 



The globdlab Helix. Shell unibilicated, globosely 

 conoid, irregularly rib-like striateil and indented, 

 dirty white, clouded with violet-<ish ; whorls five, 

 convex, the last large, inflated, rounded ; umbilicus 

 narrow, half-covered ; coluuiella smooth, sliij;htly 

 arched ; aperture lunar-oval, shining violet-purple 

 within ; lip thickened, reflected, ruddy, margins dis- 

 tant, joined by a difl'used violet-puqile layer of 

 enamel, coluniellar margin dilated, reflected. 



Mullek, Verm. terr. et ttuv. Hist. vol. ii. p. 68. 

 Ildix lucttiui, Lamarck (not of Muller). 



Eadcni var. Uelix rosucm, Muller. 



Hab. Cape of Good Hope. 



The six-'cics varies considerably in size, as may be re- 

 marked in the specimens figured, iiut is always charac- 

 terized by the same rich violet-purple colouring about the 

 aperture. Externally it is of a dirty fawn or osh-white, 

 without marking. 



Species 187. (Fig- ". *. ^^^s. Cuming.) 



Helix lucana. Uel. tedd umbilicatd, deprt»m-globo*d, 

 sttbpellucidd, ni/idd, miperne fultescente-rubrd, mblu» 

 el ill suttirin ulbd ; anfractibm quiiique, wpremii lend 

 accresceiUibiis, planiilaiis, convexis; aperturd liinato- 

 rotundatd; peristomate cras80, reJUxo, viarginibus con- 

 niventibits, callo junctis. 



The light Helix. Shell umbilicated, depressly glo- 

 bose, subpellucid, shining, fulvous-red over the upper 

 part, white beneath and in the sutures ; whorls five, 

 tilt! uppermost ones increasing slowly, flattened, con- 

 vex ; aperture lunar-rounded ; lip thickened, reflected, 

 margins approximating, joined by a callous layer. 



McLLER, Verm. terr. et fluv. Hist. vol. ii. p. 75. 



Hab. Cape of Good Hope ? 



This is quite a distinct species from the jireceding. It 

 is of a thin scmitransparent texture, peculiarly white-edged 

 in the suture, is more discoidly convoluted, with the um- 

 bilicus freely opeu, and has no indication of purple co- 

 lom'ing in the aperture. 



