II E L 1 X 



Plate CCX. 



Species 14S7. (Mas. Metcalfe.) 



Helix PROXI.m.\. IM. te»td amjili/er excatati umbili- 

 cald, clrpreHso-orbiculari, leviUr striata, alliUld, bail 

 iuhmtiilatd, liiie'u teiiuit/M fuscenceiitiiiis ciiiyiilatd ; , 

 tpird pland; anfeaclibwi qiiiiique ad sex, ultimo ro- 

 tundato, antici tiimido el de/lexo ; nperlurdfrri circii- 

 lari, labro expanm-rijlexo, maryinibiia ajiproximatin, 

 lamind callotd jiinclia. 



The allied Helix. Slicll largely exeavately ural)ili- 

 catcd, deprcssly orbicular, faintly striiitcd, wliitisli, 

 scorched at tlie base, encircled with line brown lines ; 

 spire flat ; whorls live to six, the last rounded, swol- 

 len and detlected in front ; aperture nearly circular, 

 lip cxpandedly rellectcd, margins approximated, joined 

 by a callous lamina. 



Ferussac, llist. Moll. pi. 71. f. 5. 



Hob. Coimbator, East Indies; Lcschenault. 



Characterized by a peculiarly excavated umbilicus, and 

 rounded aperture with a ratlicr broadly reflected lip. 



Species 1488. (JIus. Woollaston.) 



Helix OBSERATA. Ilel. testd oblecle imiiilicafd, coiioi- 

 deo-leuliculan, arciiatim plicalo-striald, aubhispididd, 

 sordide olivaceo-conied, basi lined ritfuld ciiigulald; 

 aiifraclibm qiiinque ad sex, aiibanffitslisy acute carina- 

 tis, ultimo aiitici dejlexo ; aperlurd oblique luiiari, 

 coidracld, labro fladcanle, aubreflexo, conslriclo, ad 

 columellam calloso-appresso. 



The closed Hblix. Shell with umbilicus closed np, 

 conoidly lens-shaped, arcuatcly plicatcly striated, 

 slightly hairy, dull olive-horny, encircled with a 

 reddish line at the base ; whorls five to six, rather 

 narrow, shaq)ly keeled, the last deflected in front ; 

 aperture obliq\iely lunar, contracted, lip yellowish, a 

 little reflected, coustrictcd, callously apprcsscd at the 

 columella. 



Lowe, Synopsis, p. 0. Albers, Malacographia Maderen- 

 sis.'p. 40. pi. 10. f. 11-14. 



Hob. Madeira. 



Of a close Ncritina-like form, allied to Il./austa. 



Species 1489. (Mus. WoUaslon.) 

 Helix sQUALTDA. JM. testa subamjuste undiiticatd, de- 

 presso-coiioided, ruguloso-slriatd, sordidi fuscesreiite ; 



aii/raetibiu quinque, rotuiidalis, ultimo aaticf deflexo , 



aperlurd lunato-circulari, labro simplici, tubexpanni. 



inlut aJiilabiato. 

 The squalid ILelix. Shell rather narrowly umbilicate<l, 



depressly conoid, rugnlosely striated, dirty brown ; 



whorls five, rounded, the last deflected in front ; 



aperture lunar-circular, lip simple, slightly expanded, 



white-edged within. 

 Lowe, Synopsis, p. 5. Albers, Malacographia Madcren- 



sis, p. 33. pi. 8. f. 13-15. 

 Hall. ^ladeira. 



Of a dull brownish colour, simply convoluted. 



Species 1490. (Mus. Metcalfe.) 



Helix L.i:SA. Uel. testd subangusH j rata, 



depreaso-globosd, plicato-striatd ti jra- 



nulatd, licido-eirescente, purpurascente tinctd; ipird 

 subconoided ; anfract'djus quinque ad sex, conrexis, 

 ultimo an/ice paululum dtjlexo ; aperlurd rotundalo- 

 lunari, labro expanso-rejiexo, alio, ad undiilicum late 

 dilatato. 



The bruised Helix. Shell rather narrowly deeply um- 

 bilicated, deprcssly globose, plicatcly striated and 

 everywhere minutely granulated, livid greenish, pur- 

 ple-stained ; spire subconoid ; whorb five to six, con- 

 vex, the last a little deflected in front ; aperture ro- 

 tundntely lunar, lip cxpandedly reflected, white, 

 broadly dilated at the umbilicus. 



IM. ? 



A simple minutely granulated species, of a jieculiar 

 purple-livid or gangrene hue, allied to II. Grayi. 



Species 1491. (Mus. Metcalfe.) 



Helix demissa. IM. testd mimitissime umbilicatd, coh- 

 rexo-depressd, conieo-albidd aut lutesernte, tulniiapka- 

 nd ; spird subpliuio-courexd, sutii, ■ '; at{frac- 



tdius sex, roluttdiitis, ad basin sii . aperlurd 



transtersi hinari, labro simplici. 



The mean Helix. Shell very minutely umbilicate«i, 

 convexly depressed, horny-white or yellowish, sub- 

 dinphanous; spire rnthcr flatly convex, suture im- 

 pressed ; whorls six, rounded, rather excavated at 

 the base ; aperture transversely lunar, lip simple. 



LiNNEY, Boston Journ. Nat. Hist. vol. iv. p. 3G1. pi IC. 

 f. 1. 



December, 1854. 



