HELIX. 



Plate CXVI. 



Species 666. (Mus. Cuming.) 



Heijx INOKNATA. Hd. (eald anijiute et profundi iimbi- 

 licald, globoso-dtpressd, supenii conferlim sudlilimme 

 oblique costellato-slriatd, olivaceo-fuscd, bast siibcon- 

 cavo-excavaid, virescenle ; spird coiitexd, obltisd; an- 

 fraclibm qidnque, planhuculU ; aperturd siiiaiiipld, lu- 

 nalo-circulari, fauce asrulescente ; pemtomate iimplici, 

 acuio, marginibm conniventibtts, columellari breviler 

 dilatato. 



The unadorned Helix. Shell narrowly and deeplj' 

 urabilicatcd, globoscly depressed, closely verj- finely 

 oblifiuely rib-like striated at tlie upper part, olive- 

 brown, greenish and somewhat concavely cxeavated 

 at the base ; spire convex, obtuse ; wliorls five, rather 

 flat ; aperture rather lari^e, lunar-circular, interior 

 bluish ; lip simple, sharp, margins approximating, 

 columellar margin shortly dilated. 



Say, Joum. Acad. Nat. Sci. Pliiladelphia, vol. ii. p. 371. 



Ilab. Pennsylvania. 



The upper surface of this shell, which is of a delicate 

 bright olive-browii colour, obtains a sdky appearance from 

 the close and regular accumulation of riblet stria;. Tlie 

 under surface of the shell is smooth, greenish, and impressly 

 hollowed. 



Species 667. (Mus. Cuming.) 



Helix glapiiyba. Hel. tentd vix umbilicatd, depressd, 

 Huperni platiimculu, lenui, olivaceo-vireute, Ueviga/d, 

 niterUe ; suturd Ihieari ; anfractiius quinque, planiiis- 

 culis, senmm accrencentibits ; nmbUico anr/usOssimo ; 

 aperlurd laid, lunari ; perMomate simplici, acuta, mar- 

 ginihus conniventibits. 



The neat Helix. Shell scarcely umbilieated, depressed, 

 rather flat at the upper part, thin, olive-green, smooth, 

 shining ; suture linear ; whorls five, rather flat, in- 

 creasing gradually ; umbilicus very narrow ; aperture 

 broad, lunar ; lip simple, sharp, margins approximat- 

 ing. 



Jay, Nichol's American Cyclopaedia, pi. 1. f. 3. 



Hab. Pennsylvania. 



Dr. Gould considers this species to be identical with the 

 European //. cellaria of Miiller, and that it has been im- 

 ported thence in plants or aljout water-casks. I take it 

 to be distinct, belonging to a type indigenous to North 



America, and abundantly represented in H. faHcowemuu. 

 laevigata, itwrnala, iiiierkxla, Planorboidet, and fuligiiuMa, 

 collected in this Plate. 



Species 66S. (Mus. Cuming.) 



Helix inteutexta. Hel. tettd vix umbilicatd, orbieu- 

 lato-convexd, vire-tcente, obliqiii arguti tiriald, linen 

 confertin concentricia granulato-deciusatd ; spird eleui- 

 td, obtwid ; anfractibut tex ad »eplfm, cOHcexitutmli*, 

 ullimo obtoleli angulalo, fa»cii» ob»oUti* taturatioriiiu 

 cinclo ; aperturd lunari; periitomale timplici, retto, 

 acuta, margine columellari tupeme reflexiutulo, uUha 

 calloio-incraiiato . 



The woven Helix. ShcU scarcely umbilieated, oriii- 

 cularly convex, greenish, strongly obliciucly striated, 

 decussately granulated witii close-set concentric lines ; 

 spire elevated, obtuse ; whorls six to seven, rather 

 convex, the last obsoletely angled, encircled with ob- 

 solete darker bands ; aperture lunar ; lip simple, 

 straight, sharp, columellar margin a little reflected at 

 the upper part, callously thickened inwardly. 



HiNNEY, .lourn. Nat. Hist. Soc. Boston, U.S. vol. iii. 

 p. 413. pi. 20. f. 2. 



Hab. Pennsylvania, Oliio, South Carolina. 



Of a pale greenish colour, thickly set with obliquely 

 arched stria;, which are crossed by minute, almost obsolete, 

 spiral lines. 



Spccie.-i 069. (Mus. Cuming.) 



Helix Vascodveuensis. Hel. tettd late umbilicatd, ur- 

 bicuUtta-depreiid, aolidiutculd, miinUiuimi et confer- 

 lim itriatd et rugulotd, olivaeto-comed ; tpird vix elr- 

 vatd; anfractibus quatuor ad quinque, plantHtculi*. 

 seruim accretcenlibus, ultimo bati lulx^mpreio, nntiri 

 deflexo ; aperlurd perobliqud, tubcirculari ; pcrittomatr 

 iiipenii depresso, iimplici, bati incratiato, breviler re- 

 flexo, marginibui approiimatit. 



The Vancouveu Helix. J>hell broadly umbilicatwl, 

 ori)icularly depressed, rather solid, vi-n- minutely and 

 closely striated ai\d wrinklcjl, olivr-honiy ; spire bul 

 little raised ; whorls four t<> live, rnthi-r tlat, increas- 

 ing slowly, the hist somewhat compiwsctl at the base, 

 deflected in front ; ajicrture vcn,- oblique, nearly cir- 



August, 1852. 



