HELIX. 



Plate XV. 



Species 56. (Mus. Cuming.) 



Helix Leytensis. Eel. testa bnperforatd, glolosa, tenuk- 

 smd,fragili, Icevimculd, palUdi vireiite, fasciis inter- 

 ruptis, albis, opacin ornata ; spird parmdd, parurn 

 elatd ; mifractibus quatuor, rapidc accrescentiius, pla- 

 niusculis, uUiniu permaguo, subanguiato ; columella 

 ienui, siibrectd; aperturd ampld, roliindato-lunarl ; 

 peristomate simplici, breviter expauw. 



The Lf.yte Helix. ShcU iraperforatcd, globose, very 

 thin, fragile, rather smooth, pale green, ornamented 

 with inteiTiipted opakc white bands ; spire rather 

 small, but little raised ; whorls four, iucreasing 

 rapidly, rather flat, the last very largo, somewhat 

 angiUar; columella thin, nearly straight; aperture 

 large, rotimdatcly lunar ; lip simple, shortly ex- 

 panded. 



ITelij; fragile, Sowerby (not of Pfeiffer), Pro. Zool. Soc. 

 1841. 

 Helix Leytenms, PfeitlVr. 



Hab. Island of Leyte, Philippines ; Cuming. 



The matiu'e form of this extremely delicate and cha- 

 racteristic species is not as yet known. The specimen 

 here figured, collected by Mr. Cuming at the island of 

 Lejle, is doubtless an entii'c whorl short of its adult 

 srrowth. 



Species 57. (Mus. Cuming.) 



Helix ignobilis. Hel. testa imperforatd, conoideo-glo- 

 bosd, tenui, striis concentricis 'minutmimu smlptd, 

 albidd, castaneo-bifasciatd ; spird conoided, apice ob- 

 iusiusculd ; anfractibus quatiior ad quinque, plaiiu- 

 latis, nltimo obtuse angulato ; columella obliqnd, dila- 

 tatd, alba ; aperturd lunato-subcirculari ; peristomate 

 late expauso, margine incrassato. 



The ignoble Helix. Shell imperforated, conically glo- 

 bose, thin, sculptured with minute concentric stria', 

 white, with two chestnut bands ; spire eonoidal, 

 rather obtuse at the apex ; whorls four to five, 

 rather flattened, the last obtusely angled ; columella 

 obUqiie, dilated, white ; aperture luuar-subcircular : 

 lip broadly expanded, edge thickened. 



SowEKBY, Pro. Zool. Soc. 18-iO, p. 103. 



Hab. Islands of Eomblon and Tablas, Philippines; Cuming. 



The colouring of this species is very simple, and tiierc 



is little variety in it. In the specimen represented at 

 Fig. 57 4 the bands are rather broader, and the shell is 

 suffused at the base with an olive-green hue. 



Species 58. (Mus. Cuming.) 



Helix Mouicandi. Hel. testa umbUicatd, semiglobom, 

 basi plaiiiusculd, nitidd, albidd, fasciis rufis cincid ; 

 anfractibus quinque ad sex, convexis, ultimo margine 

 dextro subito de/lexo ; umbilico angusto, pernio ; aper- 

 turd 7iori:ontali, transverse pyriformi ; perittomatf 

 connexo, viargine superu expauso, basali late rijlexo, ad 

 basin dente unico crasso instructo. 



Moricand's Helix. ShcU umbilicated, semiglobose, 

 rather flattened at the base, sliining, whitish, en- 

 circled by two or three red bands ; whorls five to 

 six, convex, last whorl with tiie right edge suddenly 

 deflected ; umbilicus narrow, open ; aperture hori- 

 zontal, transversely pyriforni ; lip continuous, ujiper 

 edge expanded, basal broadly retlected, furnished 

 with a single thick tooth at the base. 



Sowerby, Pfeiff'er, Pro. Zool. Soc. 1842, p. 86. 



Hab. Island of Bohol, Philippines. 



A depressly convoluted shell, concave at the base, with 

 the aperture perfectly horizontal. 



Species 59. (Fig. a, b, c, Mus. Cuming.) 



Helix .vrata. Hel. tesid umbUicatd, cglindraceo-ovatd, 

 pupafonui, crassiusculd, fused, albo-uuifasciald, inter- 

 duiii albd vel pallide lutescente, costis obUquis magia 

 minusve confertis exaratd ; suturd profunda ; anfrac- 

 tibus sex, injlatis ; columelld recti descendente, dila- 

 tatd, latissime rejlexd, plied lata umbilicali introHte . 

 aperturd lunato-rotundatd, intus albd; peristomair 

 late rejlexo, iiitus nigro-marginato, basi obsoleti den- 

 tato, marginibus callo junctis. 



The ploughed Helix. Shell umbilicated, cylindricaily 

 ovate, pupa-shaped, rather thick, brown, with a 

 single white band, sometimes wliitc or yellowish, 

 ploughed with more or less close-set obhque ribs ; 

 suture deep ; whorls sLx, inflated; columclln slniighlly 

 descending, dihited, vcpi- broadly reflected, with nn 

 umbilical fold broad, entering ; aperture hinar-ro- 

 tundate, white witliin ; lip broadly reflected, cdgi-d 



May, 1S51. 



