HELIX.— Plate XXXIV. 



Species 151. (Mus. Cumiiig.) 



Heli.x Vitrinoides. Hel.tesldvit wMlicatd, depresid, 

 lenui, Uniffatd, fratjUi, pallid? corned ; spird ei-x ele- 

 vatd ; mdurd marg'mald ; aiifractibiin sex, vix con- 

 texiusculit, ultimo lata, b(ui conoexiare ; aperturd late 

 lunari ; perialoniate gimplici, recto, acuto, vuirffine 

 coliiniellari vix re/lexiusciilo. 



The Vitkisa-like Helix. Shell scarcely uiubilicated, 

 depressed, thin, smooth, fragile, pale horuy ; spire 

 l)Ut little raised ; suture margined ; whorls six, slight- 

 ly convex, the hist broad, more convex at the base ; 

 aperture broadly lunar ; lip simple, straight, sharp, 

 columellar edge very little reflected. 



Desuayes, Guerin's Mag.de Zool. 1831, pi. 26. 



Hall. I'liilippiue Islands. 



Very similar to the preceding species, but smaller, more 

 compressed, and of a lighter homy substance. 



Species 152. (Mus. Cuming.) 



Helix excentrica. ITel. teitd subumbUicald, nuperne 

 planiusculd, busi injlatd, teiiiti, ctrrea, uilidd, itriiii 

 excentricis aubcustuUitd, acute carinald ; an/ractiiii» 

 quatuor, supra plants, rapidi accrescenlibus ; aperturd 

 securifonni ; periatomate nimplici, nculo, ad perfora- 

 liottem aiiffuatissimam dilatatu-rejlexo. 



The excextbic Helix. Shell slightly uuibilicated, rather 

 flat at the upper part, inflated at the base, thin, wax- 

 like, shiny, faintly ribl)ed with fine exeeutric stria-, 

 sharply keeled ; whorls four, flat above, increasing 

 rapidly ; aperture wedge-shaped ; lip simple, sharp, 

 dilately reflected over the very narrow umbilicus. 



I'lEiFFEB, Pro. Zool. See. 1845, p. 41. 



Ilab. Island of Siquijor, Philippines ; Cuming. 



Of the true Carocolla type, witii all the appearance of 

 being an immature shell. 



