HELIX. 



Plate CXVII. 



Species 676. (Mus. Cuming.) 



Hklix Pennsylvanica. Uel. testa obiecte perforalu, 

 tuljglobota, leaui, pellucidd, luteo-comed, auitilUer ol- 

 liqui codulald ; atifractUiuH quinque, planiunculiii, ul- 

 timo ad aperturam suieurutriclo ; aperlurd lunari; 

 pertJilomale hli reflexo, inlui alho-lahialo, marr/ine co- 

 lumellari imhreclo, exjiawso, ujiiljiliatm ohler/eitle. 



The Penxsylvanian Helix. Shell with a covered 

 umbilicus, subglobose, thin, pellucid, ycUow-honiv, 

 finely obli(jucly riljbed ; whorb five, rather flat, the 

 last somewhat constricted at the aperture ; aperture 

 lunar ; lip broadly reflected, white-edged inwardly, 

 coluniellar margin nearly straight, expanded, cover- 

 ing the umbilicus. 



Gezen, Contributions to Macliirian Lyceum of Natural 

 History, No. 1. p. 8. 

 Ilelix clauta. Say. 



Uab. Pennsylvania, Ohio, Illinois. 



The species collected in this Plate are all different forms 

 of one peculiar North American type. 



Species 677. (Mus. Cuming.) 



Helix TUTROIDES. Hel. tedd angmie umbilicatd, de- 

 preito-ijlobom, corneo-luted, regularUer ttriatd ; tpird 

 mai/ia minuiite elevatn ; anfractif/iu quinque ad sex, 

 planiusculii, ultimo ba»i convexo ; aperturd lunari ; 

 perialomate reflexo, inlu» alio, callo»o, marginiiut callo 

 tenui medio tuberadum denti/orme gerente junctit, colu- 

 mellari urabilicum temioccultunte. 



The shield-likx Helix. Shell narrowly umbilicated, 

 depressly globose, homy -yellow, regularly striated ; 

 spire more or less raised ; whorls five to six, rather 

 flat, the last convex at the base ; aperture lunar ; lip 

 reflected, white and callous within, margins joined 

 by a thin callosity bearing a tooth-shaped tubercle 

 in the middle, columellar margin ball-covering the 

 umbilicus. 



Say, Joum. -Vcad. Nat. Sci. Philadelphia, vol. ii. p. IGl. 

 Metodon leucodon, Kafinesque. 



Uab. Nortb .iVmerica. 



Of light subtransparent texture, with a broad flatly ap- 

 pressed lip and a tooth-like tubercle on the body-whorl. 



Species 679. (ilus. Cuming.) 



Helix palliata. Uel. te»ld oitecti umiilicatd, depre*$d, 

 tenui, fuMo-fc/nied, granuUUo-tlriald ; tpird vii eU- 

 vatd; an/racliiu* quinjiu-, tu/jplaHulalit, ultimo oh- 

 twie angulaUj, anlice jtaululum detcendtnU ; aperlurd 

 coardatd, niblriangulari ; perittomate tenui, angulato- 

 rtjlexo, intwt b'uUniato, denle in marguu deztro, aUero 

 tranwerw in Ijaaali pariete aperturali denle trrtio tin- 

 giii/ori/ii munilo. 



The clothed Helix. Shell with a covered umbilicui, 

 depressed, thin, brown-homy, granulately striated , 

 spire but little raised ; whorb five, rather flat, the 

 last obtusely angled, a little descending in front , 

 aperture contracted, somewhat triangalar ; lip thin, 

 angularly reflected, two-tfjotlied within, one tooth on 

 the right margin, one transverse on the Ijasal, fur- 

 nished with a third liiiguiform tooth on the wall of 

 the aperture. 



■Sat, Joum. Acad. Nat. Sci. Philadelpbia, toL iii. p. 152 

 Helix denotata, Yi'r - 

 Uelii ttotata, Desli. ; - 

 Helix CarolineniiA, Lea. 



Uab. North America. 



Of a more compa-ssed form than the preoedinK spedca, 

 with the lip toothed inwardly along the edge, and an elon- 

 gated tongue-shaped tooth on the body-whorl. 



Species 679. (Mus. Cuming.) 



Helix SaYI. Hel. tettd umbilicatd. orbicuiato-deprtt$d. 

 tenui, hi' '.'jui ta, 



contexiii- ■> wudio- 



cri ; aperturd lunato-tubcireulari, dente Umgu^urmi in 

 pariete aperturali roorctafd ; peritlomaie intu* aWo- 

 labiato, anguAli reflexo, tnargine batali wudenlatu. or- 

 lumeUari dilatalo. 



Say's Helix. Shell umbilicated, orbicularly dcprcMed. 

 thin, yellowish-homy, finely rib-like striated ; wborU 

 six, rather conrex, the last not descending ; umbi- 

 licus middling ; aperture lunar-subcircular, con- 

 tracted by a hniruiform Ifiothon tlic wall of the aper- 

 ture ; lip wti • rtcrtcd. 

 basal margin ' 



HiXNEY, Joura. Nat. Hist. Soc. Boston. U.S. toI. lii 

 p. 379. pi. 16 



AufTust, lS.i2. 



