HELIX.— Plate L. 



Carocolla soror, Wood. 

 Carocolla quadridentata, Menkc. 

 llab. Jamaica. 



Remarkable for its compressed lens-shaped form, flatted 

 out at the periphery into a very thin sharp keel. 



Species 239. (Fig. a, 6, Mus. Cuming.) 



Heli.\ aubicoma. Jlel. testa imperforald, depreuo-glo- 

 busd, solidd, superni plicis obliquin conferiis iculpia, 

 btui nitidd, striata, citriiid ; spird hrevi, ohtmd ; su- 

 titrd mediocri ; anfradihus quatuor ad quinque, con- 

 vexiiiscitlis, tdliiiio injlato ; aperturd irregulari, coarc- 

 lata, intm alba ; peristonmte incrauato, imrgine 

 dexlro arcuato, columellari dilatato, striclo, pecu- 

 liariter appresso, subexcavato. 



The golden hair Helix. Shell imperforated, dqiressly 

 globose, solid, sculptured at the upper part with 

 close-set oblique folds, striated and shining at the 

 base, citrou-colour ; spire short, obtuse ; suture mid- 

 dling; whorls four to five, rather convex, the last 

 inflated; aperture irregular, contracted, interior 

 white ; lip thickened, right margin arched, colu- 

 niellar margin dilated, long drawn out, peculiarly 

 appressed, slightly excavated. 



]■ ERUssAC, Hist. MoU. pi. 46. f. 7-9. 



Helix Bonplandi, Valenciennes (not of Lamarck). 

 Eadeni minor. Ildix microstoma, Lamarck. 

 Helix twscibilis, Fcrussac. 



Hob. Cuba. 



The smidl variety, Fig. 239 6, described by Fdrussac 

 and Lamarck as a distinct species, is of rather more solid 

 growth. The species is mainly characterized by its con- 

 tracted aperture, and by the hollow appressed growth of 

 its basal margin. 



Spcciea 240. (Fig. a, b, Mus. Cuming.) 



Helix Chittyaxa. Hel. tesid imperforald, depresto- 

 orbiculari, lenliculari,fusco-rufd, ad peripheriam acute 

 cariiiatam albicank, epidermide tenui hydrophand in 

 striijis Ifiiiiibus, acute undati-n, .supra et infra profuse 

 radiatd ; spird oblusd; anfractibus quatuor ad quinque, 

 plauulatis ; aperturd horizontali, oblcngo-lunari ; peri- 

 slomate reflexo, fusco-carneo, tnargiuibus callo teuui 

 juuctis, basali incrassato, iiitun quadridenlato. 

 Chitty's Helix. Shell imperforated, depressly orbicular, 

 lens-shaped, brown-red, whitish at the sharply keeled 

 ])eriphery, profusely rayed with a thin hydrophanous 

 epidermis deposited in thin shaqily zigzag streaks ; 

 spire obtuse ; whorls four to five, flattened ; aperture 

 horizontal, oblong-lunar; lip reflected, brown-flesh, 

 margins joined by a thin callous layer, basal margin 

 thickened, four-toothed witliiu. 

 Adams, Contributions to Conchologj', No. 2. p. 30. 

 Hab. Jamaica. 



This very characteristic new species is named by Pro- 

 fessor Adams in honour of the Hon. E. Chitty, Chairman 

 of Quarter Sessions, Jamaica, an assiduous conchologist, 

 by whom he was greatly assisted during his researches 

 in that island. 



