HELIX. 



Plate XXXVII. 



Species IGt. (Mus. Cuming.) 



Helix lucidella. Hel. tedd mimdd, umbilicald, depressd, 

 slrialuld, nitidmima, rufescente-brunned ; njurd sitli- 

 planulatd ; sidiird albo-mary'matd ; anfractibm qua- 

 Ittor, planli, uUimo bad vix eouvexiore, medio impresso, 

 angustUsinti mnbilicato ; aperlurd oblique luTiari ; pe- 

 mtoniate simplici, obtuso, margitie columellari declivi, 

 vix incramulo. 



TuE GLITTEHING IIelix. Shell miiiutc, umbilieated, 

 depressed, finely striated, glittering, red-brown ; 

 spire rather (lattened ; suture white-edged ; whorls 

 four, flat, the last more convex at the base, impressed 

 in the middle, very narrowly umbilieated ; apertm-e 

 obliquely lunar; lip simple, obtuse, columellar edge 

 slanting, scarcely thickened. 



Pfeiffer, Pro. Zool. Soc. 18i6, p. 41. 



Hab. Cagayan, Island of Luzon, Philippines ; Cuming. 



-Vn extremely small sliining horny shell of reddish hue, 

 in which the suture shows like a fine whitf thread. 



Species 165. (Fig. a,b, Mus. Cuming.) 



Helix gbadata. Hel. testa imperforatd, yloboso-tiirbi- 

 natd, driatuld, teniti, hyalind ; spird turbinatd, apice 

 acuta; anfruclibua sex, convexiuscidis, gradalin, ultimo 

 medio acute carinato, Imd convexo, sub lente minutis- 

 sime concentrice striata ; aperturd subtetrayono-lunari ; 

 peristomate simplici, acuto, margine columellari breviter 

 et verticaliter descendente. 



The step-built Helix. SIk-U imperforated, globosely 

 turbinated, finely striated, thin, hyaline ; spire turbi- 

 nated, sharp at the apex ; whorls six, rather convex, 

 arranged like steps, the least whorl sharply keeled 

 round the middle, convex at the base, beneath the lens 

 very minutely concentrically striated ; aperture some- 

 what quadrangularly lunar ; lip simple, sharj), colu- 

 mellar edge shortly vertically descending. 



Pfeiffeu, Pro. Zool. Soc. 1846, p. 110. 



Hab. Island of Lcyte, Philippines ; Cuming. 



A small glassy shell turbinated somewhat pyramidally 

 in tlie form of a Trochus. 



Species 166. (Mus. Cuming.) 

 Helix Tongana. Hel. testa imperforatd, orbiculato-ro- 



Htcd, striatuld,fragili,pMuculd, carmatd, conieo-albi- 

 caiite ; anfractibuH sex, coHvexiiuculiji, ultimo bati tub- 

 impresso; aperturd angulato-luitari ; perutomale lim- 

 plici, acuto, margine columellari breciviimi rejlexo. 



The Tonga Helix. Shell imperfonited, orbicidarly co- 

 nical, finely striated, fragile, pellucid, keeled, homy- 

 whitish ; whorls six, rather convex, the last soui<- 

 what impressed at the base; aperture angularly 

 lunar ; lip simple, shai-p, columellar edge very shortly 

 reflected. 



CluoY and Gaimaud, Voy. de I'iVstrolabe, vol. ii. p. 130. 

 p. ll.f. 19-23. 



Ilab. Island of Tonga Tabou ; Quoy. Island of N'."-. - 

 Philippines ; Cuming. 



Tliis is of a less pjTamidal form than the preceding 

 species, and broader and more impressed at the bas<\ 



Species 167. (Fig. a,b, Mus. Cuming.) 



Helix turbinifoksiis. Hel. lesfd umbilicald, TrfM-h,- 

 formi, oblique striatuld, corneo-albidd ; npird elnald, 

 apice acutd ; aiifractihus quinque, coiicexit, pantm rx- 

 sertis ; aperturd lunari ; peristomate simplici, acuto. 



The top-shaped Helix. Shell umbilieated, Trochus- 

 shaped, obliquely finely striated, honiy-white ; spin- 

 raised, sharp at the apex ; whorls five, convex, but 

 little exserted ; aperture lunar ; lip simple, sharp. 



Pfeiffer, Wiegman's Archives, 1839, p. 350. 

 Helix pgramulatoides, D'Orbigny. 

 Helix subpgramidalis, Adams. 

 Eadem var. Helix depressa, Adams. 



Hab. Islands of Cuba and Jamaica ; Adams. 



This little glassy species difl^ers from the prectdiu): 

 species iii being muljiUcated and not keeled. 



Species 168. (Fig. a, b, Mus. Cuming.) 



Helix gemma. Hel. testa subumhiticatd, cOHoideo-orbicu- 

 laid, tenui, l<rvigatd, nitidd, jielluciJd, virenli-hyaUnd : 

 spird deprexxo-couoided ; suturd submnrgiHald ; iiH- 

 fraclibus quatuor, cix convexiusculis, sensim accrmcen- 

 liiiis, ultimo noil desceiidnite ; aperturd paruta Miqud, 

 rotuiidato-luiiari ; peri.domate simplici, recto, maryiiie 

 columellari brevi, nrcualo, stijM-nie rejlrxin.vmto. 



The gem Helix. Shell slightly umbilieated, conoidal 



July, 1S51. 



