HELIX. 



Plate XXIV. 



Species 103. (Fig. a, b, c, Mus. Cuming.) 



Helix monticola. Hel. testa imperforatd, semiovatd, 

 ienui, oblique striata, Jlavd, absque iii/ore, rufo-fasciatd, 

 basi eengined ; apice oblimo ; aiifractibns quatuor ad 

 quingue, planulatis ; suturd lineari ; columella tenui, 

 excavatd, arcualu, alba ; aperturd lunato-ovali ; peri- 

 stomale simplici, reflexiusculo, nargine dextro anlici 

 subcomtricto, antrorsum arctiato. 



The hill-inuabiting Helix. Shell iinpcrforated, semi- 

 ovate, thin, ol)liquely striated, yellow, without glitter, 

 red-banded, base blue-green ; apex obtuse ; whorls 

 four to five, rather flattened ; suture linear ; colu- 

 mella thin, excavated, arched, white ; aperture lunar- 

 oval ; lip simple, a little reflected, right margin sub- 

 constricted in front, arched auteriorwards. 



SowEEBY, Pro. Zool. Soc. 1840, p. 167. 



Hab. Island of Luzon, Philippines ; Cuming. 



The most constant character in this species is its blue- 

 pp:een base. As illustrated by the accompanying figures, 

 it is sometimes encircled with mottled brown bands on 

 opake-wliite epidermis, sometimes with only a single 

 Iwnd, and sometimes without aiiv. 



Species 104. (Fig. a, b, c, d, Mus. Cuming.) 



Helix sph/Erica. Hel. testa imperforatd, globosd, ob- 

 lique irregulariter rugulosd, Jlavd, hand nitente, fascia 

 nived ad suturam, saturate rufd ad peripheriam ornatd, 

 ittterdum fusco-atrigatd ; anfractibiis quatuor ad quin- 

 que, convexiusculis, ultimo juxta aperturam comtricto ; 

 columelld laid, albd, subluberosd, ared nigricante cir- 

 cumdatd ; aperturd lunato-circulari, intus nitide nived; 

 perislomate rejlexo, nigro-marginalo. 



The spherical Helix. Shell imperforated, globose, 

 obliquely irregularly rugulose, yellow, not shining, 

 with a snow-white band at the suture, ornamented 

 with a dark red band at the periphery, sometimes 

 streaked with brown ; whorls four to five, rather 

 convex, last whorl constricted next the aperture ; 

 columella broad, white, subtuberous, surrounded 

 with a blackish area ; aperture Innately circular, 

 sliining white within ; lip rcflecti-d, edged with 

 black. 



Sowerby, Pro. Zool. Soc. 1841, p. 26. 



Hab. Islands of Luzon and Zebu, Philippines. 



This species is marked by a very rounded form, and is 

 of rather unusually thick substance. 



Species 105. (Mus. Cuming.) 



Helix bigonia. Hel. testa umbilicatd,depre>io-conoiJed, 

 tenui, obliqui striatuld,fuleido-alid,faaciis rufi» or- 

 natd, basi planulatd ; suturd lineari ; spird late conoi- 

 ded ; anfractibus quatuor ad quinque, planiusadit, 

 nllimo basi angulato ; umbilico angttnto, pervio ; 

 aperturd liorizoniali, ellipticd ; perislomate simplici, 

 margine supero expanso, basali late re/lexo. 



The two-angled Helix. Shell urabihcated, depressly 

 conoidal, thin, obliquely finely striated, fulvous white, 

 ornamented with reddish bands, flat at the base : 

 suture linear ; spire broadly conoidal ; whorls four to 

 five, rather flat, the last angled at the base ; umbi- 

 licus narrow, open ; aperture horizontal, elliptical ; 

 lip simple, upper edge expanded, basal broadly re- 

 flected. 



Ferussac, Hist. Moll. pi. 70. f. 2. 

 Helix Samarensis, PfcifTer. 



Hab. Island of Samar, Philippines ; Cuming. 



Conspicuously encircled throughout with red-brown 

 bands upon a yellowish-white ground. 



Species 106. (Mus. Cuming.) 



Helix fodiens. Hel. testd nvibilicatd, subglobosd, teuui- 

 usculd, diaphand, rufo-corned, oblique confertim pli- 

 catd; anfractibus quiiique ad sex, concexiiuculis, ultimo 

 subangulato ; umbilico angusto, pervio ; aperturd lu- 

 nato-subcirculari, intus nitide earned; perisiovuite 

 subexpanso, margine columellari dilataio, rejlexo. 



The pierced Helix. Shell umbilicated, subglobosc, 

 rather thin, diaphanous, reddish-horny, oidiquely 

 closely plicated ; whorls five to six, rather convex, 

 last whorl slightly angled ; umbilicus narrow, open ; 

 aperture lunately subcircular, shining flesh-tinged 

 within ; lip slightly expanded, columellar edge di- 

 lated, reflected. 



Pfeiffek, Pro. Zool. Soe. 1S45, p. 39. 



Hab. Island of Luzon, Philippines ; Cuming. 



The horny substance of this species is quite unlike that 

 of the Philippine Helices in general. Tlie aperture is 

 nearly round, with the lip tinged with flesh-pink. 



June, 1851. 



