HELIX.— Plate CL. 



The Helicina Helix. Shell imperforated, conical, ob- 

 liquely produced towards the aperture, arcuately stri- 

 ated, yellowish, more or less transparent, or opake- 

 white, broadly banded with red-chestnut ; whorls 

 four to five, flatly convex, sharply dilated and keeled 

 at the base ; aperture ovately trapeziform ; lip ex- 

 pandodly rcHected. 



Ho.MiiKoN and Jacquixot, (Mus. Cuming.) 



llab. Isle of Tanna, New Caledonia. 



.\ very distinct and characteristic species, resembling 



the Ilelicina-foTia kinds of Cydodoma. 



Species 977. (Mus. Cuming.) 



Hei.ix Eva. Hel. testa imperforaid, pi/ramidali-conicd, 

 tenni, mbpellucidd, obHijue ilriald, livido-canwd ; an- 

 fractiljus quinque, plano-convexh, bad acute carinai'm ; 

 aperturd ocato-trapeziformi; perislomale sitbincrassalo. 

 The Eva Helix. Shell imperforated, pyramidally-coni- 

 cal, thin, somewhat transparent, obliquely striated. 

 livid tlesh-eolour ; whorls live, llatly convex, sharply 

 keeled at the base ; aperture ovately trapeziform ; lip 

 slightly thickened. 

 PiEiFrzK, Pro. Zool. Soc. 1852. 

 Hab. Solomon's Island. 



Of a peculiar livid flesh-tint, allied in form to the pre- 

 ceding species. 



Fig. 978. (Mus. Cuming.) 



The shell here figured proves to be the II. acitminala 

 in finer condition than was represented at PI. CXXIX. 

 Sp. 785. 



Species 979. (Mus. Cuming.) 



Helix Jeny.ssi. Ifel. tentd lubitmbUicald, lurbiniformi, 

 itriatuld, teuiii, nilidd, carinatd, lacted, supra carinam 



unlfasciald ; npird brevi, cunicd, aciUd ; aiifraclibu* 

 quinque ad sex, fix concexiimculis, ultitno bati runcrx- 

 iore ; aperturd angulato-lunari ; perislomate simplici, 

 acuta, margine cnlumellari superne rejlexiusculu, nmbi- 

 licumfere claudcnte. 



Jenyns' Helix. Shell slightly umbdicateJ, turbinifonu, 

 finely striated, thin, shining, keeled, cream-colour, 

 with a single brown band above the kei-l ; spire short, 

 conical, sharp ; whorls five to six, scarcely convex, 

 the last more convex at the base ; aperture angular- 

 lunar ; lip simple, sharp, columellar margin a little 

 reflected at the upper |)art, almost closini; the umbi- 

 licus. 



Pfeiekee, Pro. Zool. Soc. 1845, p. 131. 



H(d). Isle of Tanna, New Caledonia. 



Of a delicate opal-white, encircled above the periphery 

 by a conspicuous subtranspareut brown band. 



