HELFX.— Plate LXXVII. 



Species 407. (Mus. Cuming.) 



Helix leucostoma. Hel. testa umbilicatd, depretso- 

 orbiculari, subobliqui prodiictd, subcorwpicui striata, 

 pallidi stramined, auranlio-castaneo latifasciaid, jiixta 

 suluroi peculiariter lacted; apird obtiisd; anfracli- 

 tU/un quinque, planulalis, ultimo antice descendente ; 

 umhilico subamplo, pernio ; aperturd transverse lunari; 

 perislomate late re/lexo, alio, marginilus conniveniibus, 

 basnli obscure dentato. 



The WHITE-MOUTH Helix. Shell umbilicated, depressly 

 orbicular, rather obliquely produced, somewhat con- 

 spicuously striated, pale straw-colour, broadly banded 

 with orange-chestnut, pceuliarly milk-white next the 

 sutures ; spire obtuse ; whorls five, flattened, the last 

 descending in front ; umbilicus rather large, open ; 

 aperture transversely lunar ; lip reflected, while, mar- 

 gins approximating, basal margin obscurely toothed. 



Adams and Reeve, Zool. Voy. Samarang, Mollusca, p. 16. 

 pi. 16. f. 3. 



Hab. Philippine Islands ; Belcher. 



Intermediate in its characters between //. zonalis and 

 sepukltralis. Peculiarly milk-white next the sutures. 



Species 408. (Mus. Cuming.) 



Helix spikalxs. Eel. testd umbilicatd, depretto-orbi- 

 culari, pallidi stramined, nitente, striis radiantibut 

 crebris, inlerdiim obsolelii, sculpld ; tpird obtusd ; an- 

 fractUttu quinque, dejiresso-convexiutculit, tiipertie in- 

 Jimo medio fascia caslaned ornate ; umbilico angnsli*- 

 simo, prof undo ; aperturd semiocald, labro acuto, ad 

 umbilicum cix rejlexo. 



The spiral Helix. Shell umbilicated, depressly orbi- 

 cular, pale straw-colour, shining, sculptured with 

 close-set radiating striae, which are sometimes ob- 

 solete ; spire obtuse ; whorls five, depressly con- 

 vex, the lowest encircled round the middle with a 

 chestnut band ; umbilicus very narrow, deep ; aper- 

 ture semi-ovate, lip acute, scarcely reflected at the 

 imibilieus. 



Le Guillon, Revue zool. Soe. Cuv. 1845, p. 188. 



Hah. Arrow Island. 



This species approximates also to U. connivent, bui 

 may be readily distinguished by its less thickened lip and 

 smaller umbilicus. 



