H E L I X. 



I'LATE CXLIll. 



Species 914. (Mus. Cuming.) 



Helix Clymf.xe. Ilel. iestii minu/d, late umliUcatd, de- 

 pressd, dUcoided, Katdiliformi, leuui, lavigatd, dia- 

 phand, rufetcente-corned, siMus nilididd ; spird exit/iid, 

 profundi inimersd ; aii/raciiliiis Iribits, celeriler accrea- 

 cenlibits, ultimo magtio, bijlato, aiitice puululum de- 

 Jlexo ; aperturd obliqud, lunari-subcirculnri ; peristo- 

 mate simplici, redo, maryinibus remotis. 



The Clymene Helix. Shell minute, broadly uinbUi- 

 cated, depressed, discoid. Nautilus-shaped, thin, 

 smooth, diaphanous, reddish-liorny, shining beneath ; 

 spire small, deeply immersed ; whorls three, increas- 

 ing quickly, the last large, inllated, a little deflected 

 iu front ; aperture oblique, lunar-subcircular ; lip 

 simple, straight, margins distant. 



Shuttlewortii, Diag. JloUusken, No. 1. p. \. Mem. 

 Conch, pi. 1. f. 5. 



Hub. Island of Teneriffe, Canaries. 



An extremely minute species, of discoid Nautiloid 

 growth. 



Species 915. (Mus. Cuming.) 



Helix servilis. Eel. lesld mtbampUter umbilicatd, glo- 

 boso-depressd, lamellis tenuimmis eximie costulntd, 

 conteo-rufescente ; aiifractibus quatuor, convexiusculis, 

 ultimo lion descendenle ; aperturd rolundatd ; perkto- 

 mate recto, simplici, acuto. 



The servile Helix. Shell rather largely umbilicated, 

 globosely depressed, delicately finely ribbed with 

 very thin lamella;, horny-red ; whorls four, rather 

 convex, last whorl not descending ; aperture rounded; 

 lij) straight, simple, sharp. 



SiiUTTLEWORTii, Diag. Mollusken, No. 1. p. 0. Mem. 

 Conch, pi. 2. f. 2. 



Hab. Island of Tenerifl'e, Canaries. 



Of more globose form than the preceding species. 



Species 916. (Mus. Cuming.) 



Helix pygm.e.\. Hel. tesld aperti nmhUicald, orbiculato- 

 convexd, funculd, minutissime striatd, sericiiid ; aii- 

 fractibus tribus ad qualuor, subtsqualdtus, convexius- 

 culis ; aperturd lunari ; peristomate simplici, recto, 

 acuto. 



The pigmy Helix. Shell openly umbilicated, orbicu- 

 larly convex, brownish, very minutely striated, silky ; 

 whorls three to four, nearly equal, rather convex ; 

 aperture lunar ; lip simple, straight, sharp. 



December, 



1)rap.\ukai;d, Hist. MoU. p. Hi. pi. ■<. f. 8-10. 



Iletix miuuta, Studcr. 



Ifetlx Kirbii, Shcppard. 



Zoiiites pygmteus, Gray. 

 Ilab. Europe. 



A minute subglobosc homy species, with a rather large 

 open umbilicus. 



Species 917. (.Mus. Cuming.) 



Helix PLACIDA. Ihl. testa aperti ted uiediocrUer umbi' 

 licatd, depresso-turbinatd, tenui, sublUistime 'striata, 

 diaphand, sericind, paltidi corned ; unfractihtti qua- 

 tuor, conwxis, ultimo antice vix descendenle ; aperturd 

 rotundatd ; peristomale simplici, recto, acuto. 



TiiE PLACID Helix. Shell openly but middlingly umbili- 

 cated, depressly turbinated, thin, very finely striated, 

 diaphanous, silky, pale homy ; whorls four, convex, 

 last whorl a little descending in front ; aperture 

 rounded ; lip simple, straight, sharp. 



Shuttlewohth, Diag. Mollusken, No. 1. p. fi. .Mem. 

 Conch, pi. 2. f. 1. 



Uab. Island of Teneriffe, Canaries. 



Not so largely umbiUcated as the preceding species, and 

 of more globular form. 



Species 91 S. (Mus. Cuming.) 



Helix textilis. Hel. testa perspective umhilicata, gto- 

 boso-depressd, tenui, suborbiculari, corneo-Jlavidd, in- 

 distincte rufescente-mnculatd, costulatd ; anfractibu* 

 septem, conrexis, leiiti accrescentibus ; aperturd sub- 

 vert icali, hinari ; peristoma te recto, umplici, margiui- 

 bus conniventibus. 



The textile Helix. Shell perspcctivcly umbilicated, glo- 

 bosely depressed, thin, nearly orbicular, horny-yellow, 

 indistinctly red-spotted, finely ribbed ; whorls «<-v<-ii, 

 convex, increasing slowly, aperture subvcrtical, lunar; 

 lip straight, simple, margins approximating. 



Shuttlewoiitii, Diag. Mollusken, No. 1. p. C. Mem. 

 Conch, pi. l.f. 11. 



Hab. Island of Palma, Canaries. 



Of much larger size than the preceding species, uiorr 

 depressed and more largely umbilicated. 



Species 919. (Mus. Curaiug.) 

 Helix Roseti. Ilel. testa umbilicata, semigloboto-comcd, 

 1852. 



