HELIX.— Plate CXVII. 



Ilab. North America. 



Broader and more widely convoluted, with a deep per- 

 s|jective umbilicus. 



Species 680. (Mus. Cuming.) 



Hei.ix Uoemeri. Hel. testa oblects ambilicatd, depresid, 

 tenuiusculu, confertim siriatuld, diaphanu, vix nitidiild, 

 mrdide corned; spird vix devatd ; suturd leviler im- 

 prests ; anfractibus quinque, convexiusculia, letUe ac- 

 creacentibm, ultimo ad peripheriam suhangidalo, anlici 

 vix dvHcendente ; aperturd obliqud, lunari, dente ob- 

 longo in pariete aperturali ; peristomate valide albo- 

 labiato, margine mpero recto, basali re/lexo, colutnellari 

 dilatato. 



Hoe.mer's Helix. Shell with a covered lunbilicus, de- 

 pressed, rather thin, closely finely striated, diapha- 

 nous, but little shining, dull horny ; spire but little 

 raised ; suture slightly impressed ; whorls live, rather 

 convex, increasing slowly, the last slightly angled at 

 the i)eriphery, scarcely descending in front ; aperture 

 oblique, lunar, with an oblong tooth on the body- 

 whorl ; Up strongly white-edged, upper margin 

 straight, basal reflected, columeUar dilated. 



Pfeiffeu, Zeitschrift fiir Malac. 1848, p. 117. 



Ilalj. Texas. 



This species, collected near liraunfels, Texas, by Dr. 

 Ferdinand Eoemer, belongs to the same North American 

 type as the other species figured in this Plate. 



Species 681. (Mus. Cuming.) 



Helix elevata. Ilel. testa obtect<: umbdicatd, subglobosd, 

 oblique striata, sub epidei'midi: lutescente alba ; spird 

 eleeald, lurbinatd ; aiifraclibus septem, convexiusculis, 

 ultimo injlato ; aperturd siibtriangulari ; peristomate 

 lato, intus alio, labiato, marginibus callo tenui deatem 

 validum Unguiformevi emitlente juiictis, dextro ex- 

 pansij, basali strictiusculo, njlexo, coluiiwUari dilatato. 



The raised Helix. Shell with a covered umbilicus, 

 subglobose, obliquely striated, white, beneath a yel- 

 lowish epidermis ; spire raised, turbinated ; whorls 

 seven, rather convex, the last inflated; aperture 

 somewhat triangular ; lip broad, white e<lged, maj-gins 

 joined by a thin callosity emitting a strong tongue- 

 shaped tooth, rigiit margin expanded, basal margin 

 rather drawn out and reflected, columellar dilated. 



Say, Journ. Acad. Nat. Sci. Philadelphia, vol. ii. p. 151. 

 Helix Kiioxvillina, Ferussac. 



Uab. North America. 



Chiefly distinguished from its congeners by its more 

 elevated globose form. 



Species 682. (Mus. Cuming.) 



Helix pbofunda. Ilel. iestu profundi umhilicata, orbi- 

 culato-concexd, tenui, confertim costulalo-slriatd, vivide 

 aureo-coriied, interdum fascia unicd laid rufd supra 

 peripheriam ornatd; spird vix eleeala ; anfractibu* 

 quinque, concexiusculis, ultimo vix descendente ; um- 

 bilico pervio, perspeclico ; aperturd lunari ; peristo- 

 mate lato, angulatim expanso, margine basali reflexo. 



The deep Helix. Shell deeply umbihcated, orbicularly 

 convex, thin, closely rib-like striated, bright golden- 

 horny, sometimes ornamented above the periphery 

 with a broad red band ; spire scarcely raised ; whorls 

 five, rather convex, the last a little descending ; um- 

 bilicus open, perspective : aperture lunar ; lip broad, 

 angularly expanded, basal margin reflected. 



Say, Journ. Acad. Nat. Sci. Philadelphia, vol. ii. p. 160. 



Uab. North America. 



A beautifully bright transparent species, with the 

 whorls convoluted round a broad axis after the manner 

 of a Solarium. 



Species 683. (Fig. a, J, Mus. Cuming.) 



Helix obstricta. Ilel. testd obtecte umbilicatd, de- 

 pressd, costulalo-slriatd, epidermidv nudd pallide fused 

 vestitd ; spird planiusculd; anfractiltus quinque, de- 

 pressis, acuti carinatis, carind promineiite, anfraclu ul- 

 timo basi concexo ; aperturd obliqud, subtriangulari, 

 dente lingttiformi arcuatim inlraiite parietis apertura- 

 lis coarctatd ; peristomate tenui, late expanso, iiitus 

 late albo-calloso, margine supero validi unidentato, 

 basali stricto, dilatato, reflexo, obsolete unideutato. 



The tied Helix. Shell with a covered umbilicus, de- 

 pressed, rib-like striated, clothed with a pale brown 

 naked epidermis ; spire rather flat ; whorls five, de- 

 pressed, shiu-ply keeled, keel prominent, last whorl 

 convex at the base ; aperture obli(|ue, subtriangular, 

 contracted by a touguc-slia]icd tooth entering iu on 

 arched manner ui)on the wall of the aperture ; lip 

 thin, broadly expanded, broadly whitc-c<Ulous within, 

 upper margin strongly one-toothed, basjd ilniwn 

 out, reflected, obsolclely one-toothed. 



Say, Journ. Acad. Nat. Sci. Philadelphia, vol. ii. p. 154. 



Uab. Ohio, North Auierica ; Sny. 



