HELIX. 



Plate LXIV. 



Species 323. (Mus. Cuming.) 



Helix TunniMFORSiis. Ilel. testa vix umbUicatd,pi/ra- 

 midali-conicd, obliqui ruyoso-driatida ; y)ird elevatd, 

 siilurd impressd; an/raciiius septem, convexis, ultimo 

 basi aiigulato, infra mbplatialo ; aperlurd ovali, sub- 

 horizontali, labro simplici, margine columeltari re/lexo, 

 umbilicum fere ter/ente. 



The top-shaped Helix. Shell scarcely umbilicated, 

 pyramidally conical, obliquely roughly striated ; spb:e 

 raised, suture impressed ; whorls seven in number, 

 convex, last whorl angled at the Ijase, rather flat- 

 tened beneath ; aperture oval, nearly horizontal, lip 

 simple, columellar edge reflected, almost covering the 

 umbilicus. 



Pfeiffer, inWiegman's Archives, 1839, p. 350. 

 Helix pyramidatoides, D'Orbigny. 

 Helix pyramidalii, Adams. 



Var. perdepressa. Helix depressa, Adams. 



Uab. Cuba. 



A white semitranspiU'ent glassy shell, of a true pyra- 

 midal Trochus-like growth, more or less depressed in its 



manner of convolution. 



Species 324. (Mus. Cuming.) 



Heli.x fuagilis. Hel. testa subprofundi utniilicatd, d«- 

 presso-globosd, oblique corrugato-costatd, nitidi corned ; 

 spird obtitsd ; anfractibus quatuor, convexis, ultimo ro- 

 tundato ; aperturd ampld, subcirculari, labro tenui, 

 margine columellar i subrejlexo. 



The fragile Helix. Shell deeply umbilicated, depressly 

 globose, oblicjutly ribbed in a wrinkled manner, 

 shining homy; spire obtuse; whorls four, convex, 

 tiic last rounded ; aperture large, nearly circular, lip 

 thin, columellar edge a little reflected. 



Pfeiffer, in Wicgman's Archives, 1839, p. 350. 



Hall. Cuba. 



A dark bright brown pea-shaped shell, obliquely ribbed 

 tliroughout in a peculiarly wrinkled manner. 



Species 325. (Mus. Cuming.) 

 Helix peraffinis. Hel. testa umbilicald, depressa. 



striatuld, hjalind ; npird brnimmd, obtutd ; anfrac- 

 tibus sex, concexi-t, ultimo roluiidato, basi planiuiculo ■ 

 ttmbilico mediucri ; aperturd aitbverticali, trianguUtlo- 

 lutiari ; peristomate simplici, aculo, margine dextro 

 aubverticali, columellari brevinsimi reflexo, basalt slric- 

 tiusculo. 

 The closely allied Helix. Shell umbilicated, de- 

 pressed, finely striated, hyaline ; spire vcr)' short, 

 obtuse ; whorls six, convex, the last rounded, ratiier 

 flat at the base; umbilicus middling; aperture nearly 

 vertical, triangularly lunar; lip simple, acute, right 

 margin subvertieal, columellar margin very shortly 

 reflected, basal margin rather drawn out. 

 Adams, Pro. Nat. liist. Soc. Boston, U.S., 1845, p. 16. 

 Hab. Jamaica. 



A species of simple form without any particularly cha- 

 racteristic feature. 



Species 336. (Mus. Cuming.) 



Helix ptychodes. Hel. testa umbilicald, depremitsimd. 

 discoided, Itnuissimd, arcuato-plicald, sub epidermide 

 tenui, fused, decidud hgalind ; spird planiiucuia ; an- 

 fractibus quatuor ad quinque, planulatis, ultimo bait 

 vix contexo ; umbilico mediocri ; aperturd perobliqud, 

 ampld, angulato-lunari ; peristomate simplici, aculo. 



The fold-like Helix. Shell umbilicated, very de- 

 pressed, discoid, very thin, arcuately plicated, hyaline 

 beneath a thin brown deciduous epidermis ; spirt- 

 rather flattened ; whorls four to five, flattened, the last 

 but little convex at the base ; umbilicus middling ; 

 aperture very oblique, large, angularly lunar; lip 

 simple, acute. 



Pfeiffer, Pro. Zool. Soc. 1845, p. 137. 



Hab. Jamaica ; Gosse. 



A thin transparent horny CarocoUa form, with the spire 

 perfectly depressed on a broad plane, and plicately wrinkled. 



Species 327. (Fig. a, b, Mus. Cuming.) 



Helix ghiseola. Hel. testa umbilicald, depre.s' 



oblique striatuld, niliduld, gri»ed, ciugulit iineitque 

 opaco-albis circumdatd ; spird bred; anfraclibui quatuor 

 ad quinque, vix conc^xiusculii ; umbilico augusliuimo , 



January, 1852. 



