HELIX. 



Plate CXXII. 



Species 724. (Mus. Cuming.) 



Helix line.\t.\. Hel. testa late mnbiUcaid, subdUcoidt-d, 

 tenui, pallide Jlavescente, striii conceiitricis conferlia 

 Uneatd ; spird brevisaimd; anfractibm qualuor ad 

 guinqne, suturd impressd ; aperturd lunari,intM remote 

 bideulatd ; peridomate simpUci. 



The lineated Helix. Sliell broadly umbilicated, sub- 

 discoid, thin, pale yellow, lineated with close-set 

 concentric lines ; spire very short ; whorls four to 

 live, with the suture imjjresscd ; aperture lunar, re- 

 motely two-toothed within ; lip simple. 



Say, Jouni. Acad. Nat. Sci. Philadelpliia, vol. i. part 1. 

 p. 18; part 2. p. 373. 



Hab. Philadelphia, JIassaehusetts, North America. 



Distinctly characterized by its spiral concentric lines. 



Species 725. (Mus. Cuming.) 



Helix pulchella. Hel. testd umbilicald, siildepressd, 

 alhidd, nitidd, glabra; anfractibm trUim ad qualuor, 

 coHvexiusculis, ultimo antice dilatato, non dejlexo ,• 

 aperttird obliqud, aubcirculari ; peristomate rejlexo, 

 candide suhlabiato, marginibus approximatis. 



The pretty Helix. Shell umbilicated, somewhat de- 

 pressed, whitish, shining, smooth ; whorls three to 

 fom', rather convex, the last dilated in front, not de- 

 flected ; aperture oblique, nearly circular ; lip re- 

 flected, white-thickened inwardly, with the margins 

 approximating. 



MuLLER, Verm. terr. et fluv. Hist. vol. ii. p. 30. 

 Helix paludosa, Walker. 

 Helix minuta. Say. 

 Helix cryntallina, Dillwyn. 



Hab. Eui-ope, Madeira, North America. 



A small white glassy Cyclostoma-Vike shell. 



Pig. 726. OIus. Cuming.) 



This shell, an authentic specimen of //. minuta, Say, 

 can only be regarded as a variety of the preceding, if not 

 synonjinous with it. 



Species 727. (Mus. Cuming.) 



Helix striatella. Hel. testd umbilicald, orbiculalo- 

 cottvexiusculd, tenuitsimS, fusco-corned, cor\ferlim cos- 



tulald ; anfractihut qualuor, vix convexiuseulit, ultimo 

 iati iiijlalo, latiusculo ; umbilico majutculo, pertio ; 

 aperturd subcirculari; peristomate timplici, acuta, 

 marginibus approximnlis. 



The finely striated Helix. Shell umbilicated, orbi- 

 cularly convex, very thin, brown homy, closely finely 

 ribbed ; whorls four, rather convex, the last inflated 

 and rather broad at the base ; umliilicus rather large, 

 open ; aperture nearly circular ; lip simple, sharp, 

 with the margins approximating. 



Anthony, Jouni. Nat. Hist. See. Boston, L'.S. vol. iii. 

 p. 278. pi. 3. f. 2. 



Hub. Ohio, Massachusetts, North -Vmerica. 



Distinguished by its hollowed base, dark-broim colour, 

 and characteristic ribbed sculpture. 



Species 728. (Mus. Cuming.) 



Helix labybinthica. Hel. testa umbilicald, eonicd, 

 costulatd, saturate rufd, tiibtm pallidiore, ttecigalii, 

 nitidd; aiifractibus quinque ad sex, conceriutculis ; 

 umbilico angusto, pervio ; aperturd viz obliqud, lu- 

 nari ; pm-itomatc breviter refexo, simplici ; pariele 

 aperturali deiile viajusculo lanieltiformi inlrante et 

 lined elevatd interdum obsoleld prope columellam 

 munito. 



The labyrinthine Helix. Shell umbilicated, conical, 

 finely ribbed, dark red, paler smooth and shining 

 beneath ; whorls five to six, rather convex ; umbilicus 

 narrow, open ; aperture scarcely oblique, lunar ; lip 

 shortly reflected, simiile ; wall of the a|XTturc fur- 

 nished with a rather large entering lanicUifonn tooth, 

 with a raised line, which is sometimes obsolete, near 

 the columella. 



Say, Jouru. Acad. Nat. Sci. Philadelpliia, vol. i. part 1. 

 p. 121. 



Hab. Pennsylvania, Missouri, Massachusetts, Texas, 

 North America. 



A small finely-ribbed shell, of conical growth, of a dark- 

 brown colour, with sometimes n i)lrwi<l-n'(l iridescent hue, 

 iiiiving one sometimes two entering lamellar plaits on the 

 bodv-whorl. 



Species 729. (Mus. Cuming.) 



Helix multidentata. Hel. testa umhitieatd, orhicu- 

 lata, depressd, niliduld, corned, lupemi nyularitrr 



August, 1852. 



