HELIX. 



Plate 1. 



Species 1. (Pig. 1, 2, t, Mus. Cuming.) 



Helix ovum. llel. testa subumbilicatd, ghboao-depressd, 

 oblique striata et irregulariter nigosd, lineis impressis, 

 apice confertisaimis, in anfractu ultimo remolis et irre- 

 gulariius mbdecmsatd, noiinunqitam rugoso-malleatd, 

 obtuse carinatd, fulvo-castaiied, interdum fascia supra 

 carinam pallidd, infra carinam purpureo-nigricanle 

 oniatd ; suluris canaliculatis ; anfractibm quinqm, 

 superni tumidis, ultimo ad colurnellam excavato ; aper- 

 lurd liinato-elUpticd, intus nitide looted ; peristomate 

 simplici, crasso, margine dextro arcuatim dilatato. 



The egg Helix. Shell scarcely umbilicated, globosely 

 depressed, obliquely rugose, subdecussated with im- 

 pressed liues, very close-set at the apex, remote and 

 iri'i'gular on the last whorl, sometimes roughly in- 

 dented, obtusely keeled, fulvous chestnut, sometimes 

 encircled with a pale band above the keel, tinged 

 with pui-ple-black below the keel ; sutures cliannclled ; 

 whorls five, swollen at the upper part, the last whorl 

 excavated about the columella ; aperture lunar-ellip- 

 tical, shining white within ; lip simple, thick, rifiht 

 edge arcuately dilated. 



Valenciennes, Voy. Humboldt and Bonpland, Zool. 

 vol. ii. p. 242. pi. 56. f. 4. 

 Helix Otalieilana, Ferussac. 

 Helix meridioiialis, Wood. 



Hab. Islands of Luzon and Panay, Philippines; Cuming. 



The three specimens here figured represent the extreme 

 varieties of the species, Fig. 4 being the type, Fig. 1 the 

 variety j3 of PfeifiVr, and fig. 2 the variety y of the same 

 author. In the first the whorls are l)road and compressed, 

 in the second they are more swollen and encircled by a 

 band of light epidermis. The third variety is chiefly re- 

 markable for its wrinkled indented scidpture. At first 



they seemed to represent so many distinct species, and 

 are numbered accordingly in the phite, but upon further 

 examination they prove to be, as defined by Pfeiffer, 

 different states of tiie same. 



The specimen of H. ovum figured by M. Valenciennes 

 in Humboldt and Eonpland's Voyage, from the collection 

 of a gentleman who resided at llanilla, is a dead bleached 

 shell deprived of its epidermis. 



For Sp. 2 and 4, see PI. IX. 



Species 3. (Mus. Cuming.) 



Helix sagittifera. Hel. testa subumlilicatd, depressd, 

 oblique striatd et obsolete rugosd, fultd, maadis sagit- 

 tiformibus et ad carinam obsoletam fascia itnicd rufd 

 ornald; suluris impressis, ad anfraclum ultimum sub- 

 canaliculatis ; arfractibus quatuor ad quinque, plani- 

 uscidk, ultimo inflato ; aperturd perobliqud, lunato' 

 ovali, intus lacted ; peristomate simplici, ad colurnel- 

 lam subincrassalo, vix reflexo, margine supero dejiexo. 



The aubow-head-markei) Helix. Shell sub-umbili- 

 catcd, depressed, obliquely striated and obsolctely 

 \mnkled, fulvous, ornamented with arrow-headed 

 marks and an obsolete red band at the keel ; sutures 

 impressed, rather channelled in the last whorl ; 

 whorls four to five, rather flattened, last whorl in- 

 flated ; aiierture very oblique, lunju--oval, white within ; 

 lip simple, rather tliickencd about the columella, but 

 little reflected, upper edge deflected. 



Pfeifker, Pro. Zool. Soc. 1842, p. 86. 



Hab. Island of Luzon, Philippines ; Cuming. 



The arrow-head marks in this species arc exceedingly 

 characteristic; they are sometimes nearly obsolete, but, 

 however faint, are sufficient to distiuguish the species. 



.March, 1851. 



