HELIX. 



Plate XXIX. 



Species 124. (Fig. a, b, c, d, Mus. Cuming.) 



Helix Dryope. Eel. testa imperforatd, orbiculalo-con- 

 texd, tenui, siilililimme decmsatd, nilidiild,Jlavescenli- 

 viridi, acute carinaid; spird aubelevatd, apice nigri- 

 cante ; an/raciibiis quatiior ad quinque, subplanulalis, 

 ultimo bast plaitiiiaciilo, antice hreviter dejkxo ; aper- 

 turd mbhorizoutali, angulato-eUipticd, ad carinam siib- 

 canalieulatd ; perisiomate simplici, tenui, margitie 

 ■vipero recto, basali breviter rejlexo, columellari dila- 

 tato, appresso, albo vel nigra. 



Duyope's Helix. Shell imperforated, orbicularly convex, 

 thin, very finely decussated, shining, yellowish-green, 

 sliarply keeled ; spire slightly raised, blackish at the 

 apex ; whorls four to five, rather fluttcucd, llie last 

 rather flattened at the base, shortly deflected in front ; 

 aperture nearly horizontal, angulai'ly elliptical, slightly 

 channelled at the keel ; lip sini[)le, thin, ujiper mar- 

 gin straight, basal margin shortly reflected, colu- 

 meUar dilated, appressed, white or black. 



Carocolla Dryope, Erodcrip, Pro. Zool. Soe. 1841, j). 37. 

 Helix prasina, Koch. 



Hal). Island of Burias and Luzon, Philippines ; Cuming. 



A delicate seniitransparent sea-green shell, sometimes 

 encircled with a black-brown spiral baud. Wlierc the 

 columella is black-brown the coloiu- is mostly coutiuued 

 along the lip. 



Species 135. (Fig. a, b, Mus. Cuming.) 



Helix Regin.e. Hel. testa imperforatd, depressd, tenuis- 

 simd, subliliter striata, lineis minutissimis concentricis 

 subdecussatd, pellucidd, nitidd, smaragdind ; spird de- 

 pressd, planiusculd ; anfractibus quatuor, subplanulatis, 

 rapide accrescentibus, ultimo acute carinato, basi iiijlato ; 

 aperturd angulato-lunari ; peristomate simplici, tenui, 

 margine supero expanso, basali breviter rejlexo, colu- 

 mellari leviter araialo, subdilatato, appresso. 



The Queen's Helix. Shell imperforated, depressed, 

 very thin, finely striated, slightly decussated with 

 ven,' minute concentric lines, transparent, shining, 

 emerald-blue ; spire depressed, rather flattened ; 

 whorls four, rather flattened, increasing rapidly, the 

 last sharply keeled, inflated at the base; aperture 

 angularly lunar ; lip simple, thin, upper margin ex- 

 panded, basal margin shortly reflected, coluniellar 

 margin sUghtly arched, dilated, and appressed. 



Carocolla Jtegina, Broderip, Pro. Zool. Soc. 1841, p. 36. 



Hab. Island of Zebu, Philippines ; Cuming. 



This extremely delicate and beautiful species is truly 

 remarkable for its fine emerald-bluc colourin>'. 



Species 126. (Fig. a, i, c, d, Mus. Cuming.) 



Helix Thersites. Hel. testd imperforatd, tuicompta- 

 natd, gibbd, tenui, subdiapltand, sulphured, castaHeo- 

 fasciatd ; spird parum elatd ; suturd lineari ; anfrac- 

 tibus quatuor ad quinque, planiusculis, ultimo non de- 

 Jlexo, acute carinato, prope aperturam subitb rotuiidato, 

 gibbo ; aperturd subhorizontali, semiovali ; peristomatt 

 simplici, late expanso. 



Thersites' Helix. Shell imperforated, somewhat 

 smooth, gibbous, thin, rather diaphanous, sulphur- 

 coloured, banded with chestnut ; spire but liltlt 

 raised ; suture linear ; whorls four to five, rather 

 flattened, the last not deflected, sharply keeled, sud- 

 denly rounded near the aperture, gibbous ; aperture 

 almost horizontal, semioval ; Up simple, broadly ex- 

 panded. 



Carocolla T/wrsites, Broderip, Pro. Zool. Soc. 1841, p. 38. 



Hab. Island of Mindoro, Philippines ; Cuming. 



This species is characterized by a singular contracted 

 growth just before reaching maturity. It has the ap- 

 pearance of an accidental distortion, but is constant in oil 

 specimens. 



June, 1851. 



