HELIX. 



Plate XXXIII. 



Species 139. (Mus. Cuming.) 



Helix cyatuus. Ilel. testii umbilicatd, orbiailato- 

 conicd, mipeme urriiatim costulato-slriata, nnicolore, 

 fiucd; npird eUtald, obtusi conicd ; sulurd didincld, 

 crenulato-viarginald ; anfractibus sex ad seplem, con- 

 vexiuscidu, ullhno carhut/o, bau sublavigalo, planius- 

 culo ; umiilico magno, prof undo, cgathiformi ; aperlurd 

 mbverticali, angulato-lunari ; periilomate simpUci, 

 margine sttpero recto, basali arcitalo, reflexitmcido, colu- 

 viellari breviter deaceiidente. 



The cup Helix. Shell unibilicated, orbicularly conical, 

 sculptured over the upper part witli arched rib-like 

 strife, unifonu brown colour; spire raised, obtusely 

 conical; suture distinct, crenulately margined ; whorls 

 six to seven, slightly convex, the last keeled, rather 

 smooth and flattened at the base ; umbilicus large, 

 deep, cup-shaped ; aperture rather vertical, angidarly 

 luuar; lip simple, upper edge straight, basal edge 

 arched, a little reflected, columellar edge shortly de- 

 scending. 



Pfeiffek, Pro. Zool. Soc. 1845, p. 123. 



Hab. St. Juan, Pro\ince of Cagayan, Island of Luzon, 

 Philippines ; Cuming. 



A thin horny sharp-angled species, having the fonn of 

 Solarium. 



Species 140. (Fig. a, b, Mus. Cuming.) 



Helix acutimargo. Hel. testd depressd, supra plartius- 

 culd, bad convexd, tenui, pellucidd, palUdi corned, acute 

 carinatd, supra carinam slrik iionnullls spiraliius con- 

 fertis notald ; anfraciiius sex, lenle accrescetdibus ; 

 umbi/ico mediocri, penio ; aperlurd angulato-lunari ; 

 peristomate simplici, aculo. 



The sharp-edged Helix. Shell depressed, rather flat 

 at the upper part, convex at the base, thin, trans- 

 parent, light horny, sharply keeled, marked above 

 the keel with a few close-set spiral lines ; whorls six. 

 Increasing slowly ; mnbilicus middling, open ; aper- 

 ture angularly lunar ; lip simple, acute. 



Pfeiffer, Pro. Zool. Soc. 1845, p. 40. 



Hab. Island of Negros, Philippines ; Cuming. 



This has very much the form of JI. planorbis, but it is 

 of a diflcrent substance, pale homy and transparent. The 

 keel forms a kind of thread around the spire, and is seen 

 throughout in the place of the suture. 



Species 141. (Mus. Cuming.) 



Helix hadula. Hel. testd umbilicatd, depretsd, tublenti- 

 culari, .folidiu.sculd, pallidi corned, carinald, ulriis in- 

 crementi coiifertis et lineis aaiti prominentihua tpirali- 

 bus exasperatd; anfraclibiu sex, convexiwiculii, tenti 

 accreicentibus, ultimo basi injlnto, cotifertim et radiatim 

 costulato-striato ; umiilico mediocri, pervio ; aperlurd 

 lunato-ellipticd ; peristomate simplici, eix incrauato, 

 marginibus callo lineari junctis. 



The grater Helix. Shell umbilicated, depressed, sub- 

 lenticular, ratlicr solid, bght homy, keeled, roughened 

 with close-set stria; of growth and sharply prominent 

 spiral lines ; whorls six, rather convex, increasing 

 slowly, last whorl inflated and scuiptiu'cd at the base 

 with close-set rayed rib-like stria; ; umbilicus mid- 

 dling, open ; aperture lunar-elliptical ; lip simple, but 

 little thickened, margins joined by a linear callosity. 



Pfeiffer, Pro. Zool. Soc. 1845, p. 40. 



Hab. Prorince of Hocos, Island of Luzon, Philippines ; 

 Cuming. 



The chief peculiarity of this species consists in the de- 

 licate raised lines which encircle the spire. 



Species 142. (Fig. a, b, Mus. Cuming.) 

 Helix quieti's. Hel. testd umbUicatd, subdiscoided, ful- 

 vesceide-conied, diaphand, sub lente undique minutii- 

 sime granoso-punctatd ; spird depresm ; '' 'w 

 quinque, vix contexts, ultimo tentricoso ; , 

 diocri, pro/undo, pervio; aperlurd luHoto-rotundatd, 

 verticali ; peri-itomate carneo-albicante, subexpanso, ar- 

 cuatim descendente. 

 The lxdistirbed Helix. Shell mubilicated, subdis- 

 coid, fulvous horny, diaphanous, beneath the lens 

 everywhere minutely gninosely punctured ; spire de- 

 pressed ; whorls five, convex, last whori vent' 

 umbilicus middling, deep, open; aperture lu 

 rounded, vertical ; lip flesli-white, a Utile expanded, 

 arcuatcly descending. 

 Hab. Province of Misamis, Island of Mindanao, Philip- 

 pines ; Cuming. 



This approaclies very nearly in fomi to // 

 Ferussac, but it will be found to be distinct on I ., 



Species 143. (Mus. Cuuiing.) 

 Hklix Miguelsiaxa. Hel. Md mniilicatd, gUoui. 



July, 1851. 



