HELIX. 



Plate XCIX. 



Species 543. (Mas. Cuming.) 



Helix subcastanea. ITel. lesld umhilicald, orLiculato- 

 convexa, suicaslaned, mittutissinie granulatd; spird sitb- 

 elevald ; aiifraclibu.i quinque ad sex, vLc cnnvexius- 

 culis, uUimo angulalo, antici subito dejkxo, bad itijiato, 

 ad aperluram conslricio et scrobiculato ; umbilico me- 

 diocri ; aperturd perobliqud, auriculari ; perklomate 

 albo, iiicrasHato, marffiiiibiis callo leiiui juiiclk, dvxlro 

 arcuato, baaali siricliusculo, denticulato, ambobm dente 

 magno hdrante separa/is. 



The chestnut-tinged Helix. Sliell urabilicated, or- 

 bicularly convex, chestnut-tinged, very minutely gra- 

 nulated ; spire slightly raised ; whorls five to six, 

 rather convex, the last angled, suddenly deflected in 

 front, inflated at the base, drawn in and furrowed at 

 the aperture ; umbilicus middling ; apert'ire very 

 oblique, car-shaped ; lip white, thickened, joined by a 

 thin callous layer, right margin arched, basal rather 

 drawn out, toothed, both separated by a large en- 

 tering tooth. 



Caracolla glohosa, Broderip (not U.globosa, Sowerby), Pro. 

 Zool. Soc. 1832, p. 30. 

 Helix mbcaslanea, Pfeiffer. 



Hab. Tumaco, West Columbia ; Cuming. 



Distinguished by an obscure oblong protuberance on 

 the columellar margin, and a single prominent narrow 

 raised tooth at the base. 



Species 5-14. (Mus. Cuming.) 



Helix bitubeuculata. Ilel. testa imperforatd, orbicu- 

 lari-conicd, basi plano-concavd, intense nigricante-cas- 

 taned, epidermide luted unduto-lenligitiosd ; anfractibm 

 quinque, coitvexis, ultimo obtuse carinato ; aperturd 

 Jtorizontali, suboldongo-quadratd ; peri-itomate alio, re- 

 Jlexo, marginiius cullo junctis, columetlari dentiius 

 partis duobus, basali denlibus parvis duobus subdistan- 

 tibu.1 prominentibus aculix. 



The two-tubeucled Helix. Shell imperforated, orbi- 

 cularly conical, flatly concave at the base, very dark 

 blackish-chestnut, zigzag-freckled with a yellowish 

 epidermis ; whorls five, convex, the last obtusely 

 keeled; aperture horizontal, somewhat oblong-square; 

 lip white, reficctcd, margins joined by a callosity, 

 columellar mar;rin with two small teeth, basal mar- 



gin with two small rather distant prominent sharp 



teeth. 

 Pfeiifeu. Pro. Zool. Soc. 1846. 

 Uab. Tungaragua, Ecuador; IJourcicr. 



This little species is well distinguished from the rest of 

 its congeners collected in this Plate, by its pretty wnve- 

 freeklcd epidermis. 



Species 545. (^[us. Cuming.) 



Hklix Boukcieri. Ilel. testa imperforald, globoid, tub- 

 injlatd, plicato-striatd, intensi castaiied, apice r«- 

 fescente ; spird obtuse depressd ; anfract'dius qiiaiuor, 

 coHvexis, ultimo vix carinato, rotuiidalu, bati mnlio 

 impreud ; aperturd horizontali, lubobloHgo-quadrnld ; 

 peristomate incrassato, breviler reflexo, alb'ulo rl piir- 

 purascente, margine columellari denlibus parvis duobus 

 contiguis oblusis, basali dente pnrto unico subobsoleln. 



Bourcier's Helix. Shell imperforated, globose, some- 

 what inflated, plicately striated, dark chestnut, red- 

 dish at the apex ; spire obtusely depressed ; whorls 

 four, convex, the last scarcely keeled, rounded, im- 

 pressed in the middle at the base ; aperture horizon- 

 tal, somewhat oblong-square ; lip thickened, shortly 

 reflected, whitish and purplish, columellar raarsriii 

 with two small contiguous blunt teeth, basal margin 

 with a single small nearly obsolete t(Mjtli. 



Pfeiffeb, Pro. Zool. Soc. 1850. 



Eab. Otoralo, Ecuador ; Bourcier. 



Collected by, and named in memory of, M. Boureier, 

 late Consul-Geiieral of Ecuador. 



Species 546. (Mus. Cuming.) 

 Helix Obeas. Ilel. testd umbiUcatd, d^ mtald, 



striatd et minutissime granulosa, in .i, ad 



apicem ru/escenle ; spird vix elevatd ; an/rarlibus qmm- 

 que, plauiusculis, ultimo antici rotundato, adapfrturam 

 conslricio, basi injUito ; aperturd perobli^ud, semiova/i, 

 bidenlatd; jwriitomate albo, rejlexo, margiuibus callo 

 albo funiculato junctis, supero arcuato, basali itrictiui- 

 culo, ambubus dente acuta sfparalis, dent*: altrro i» pa- 

 riete illi opposito. 

 The Obeas Helix. Shell umbilicnled, depivssod, angled, 

 striated and very minutely granulotcd, livid-cheat- 



May, 1852. 



