HELIX. 



Plate XXXVIII. 



Species 171. (Mus. Curaiiig.) 



Helix lanx. Hel. testa late umbilicatd, dcpressd, obime 

 carinatd, oblique striata et rwjoso-malleata, fused, 

 infra carinam snliirittiore, circa umbilicuvi oUvaceo- 

 liited ; a/ifractibits tjuinijw, plauiuscitlis, ultimo antice 

 suhd(flexo ; nmbilico peramph, pervio ; apertura lu- 

 nato-eUipticd, iiitus subiridescente ; perislomate re- 

 fiexo, iiituK crrrulesceute-alio, marr/iiiibus approximatis, 

 callo tenui junclis, dexlro sinuoso. 



The msii IIeli.x. Shell broadly uinbilicated, depressed, 

 obtusely keeled, obliquely striated and rugosely in- 

 dented, brown, darker beneath the keel, olivaceous- 

 yellow around the umbilicus ; whorls five, rather flat, 

 the last a little ileflected in front ; umbilicus very 

 large, open ; aperture lunately elliptical, rather iri- 

 descent within ; lip reflected, inner edge bluish- 

 wliite, margins approximated, joined by a thin callo- 

 sity, right edge sin\iatcd. 



Feiiussac, Hist. :Mo11. pi. G5. f. 7. 

 Eadem. Helix Kadama, Lesson. 



JIai. Jladagascar. 



A very characteristic species allied in form to //. sepul- 



chraVa and Cunningharni. 



Species 172. (Fig. a, b, Mus. Cuming.) 



Helix ovifokmis. Hel. testa vix mtibilicatd, ovaid, tenni- 

 usculd, minutksime slriato-r/rannlatd, rugis obliquis 

 obsolete sculptd, rvfesceute-fascd, caslaneo bifascialu ; 

 spird brevi, suliconoifled, apiee retusd ; anfraclibus qua- 

 tuor, rapiJe accrescentibus, ultimo mullo itijlato ; colu- 

 mella albd, subintortd; apertura ampld, lunato-ovali, 

 inlu.t lividd ; peristoma te simplici, late expaiiso, bre- 

 viler rejiexo, margiiiibu^ callo tenuissimo junclis, colu- 

 mellari dilatato, appresso. 



The egg-shaped IIeli.x. Shell scarcely unibilieated, 

 ovate, rather thin, very minutely striately grauukd, 

 and obsoletely sculptured with oblique wrinkles, red- 

 dish-brown, marked with two chestnut bands; sjjire 

 short, subconoid, blunt at the a])ix ; whorls four, 

 increasing rapidly, the last nmeh inflated ; columella 

 white, rather twisted ; aperture large, lunar-oval, 

 livid within; lip simple, broadly expanded, shortly 

 reflected, margin joined by a very thin callosity, 

 coluraellar margin dilated, appressed. 



July, 



GitATELOLi', Act. Soc. Linn, dc Bordeaux, vol. xi. p. -v.", 

 pi. 2. f. 2. 

 An eadem ? Ilelix amphUtuUma, Ferussac. 

 Hub. Madagascar. 



The columella has a very characteristic twist in this 

 species, giving an elegant cur\aturc to the aperture, 

 which serves to distinguish it, among other peculiariticf. 

 from the larger //. Goudotiaiia. 



Species 173. (JIus. Cuming.) 



Helix cokno-giganteum. Ilel. testa k. ■'r- 



presso-ovatd, aurifonni, tenuiculd, minu/t 7<t 



oblique sculptd, rugulusd, sub epidermide caitaurd rW 

 olivared, decidud, pallidi rufescente ; spir ' ' 'a ,■ 

 anfrnctibus quuluor, rapidinsimi accres-- nu 



peramplo, ad periplieriam costis nonnutlit obsoleli* 

 cincto, subtus concavo ; apertura perobliqua, orati ; pe- 

 rislomale iiicraasato, reflexo, tiiarginibu/i callo crasmi 

 aiigufatim junclis, columellari dilatato, umliiticum fere 

 tegente. 



The giant's horn Helix. Shell urabilicated, deprcssly 

 ovate, ear-sha])ed, rather thin, minutely and n-gu- 

 larly obliquely scul|)tured, rugulose, pale n'ddisb 

 beneath a deciduous chestnut or olive epidermis; 

 spire scarcely raised ; whorls four, increasing vcn" 

 rapidly, the last very large, encircled at the pcri]ihcrj 

 by a few- obsolete ribs, concave bencatli ; aperture 

 very oblique, oval ; lip thickened, reflected, marjrins 

 angularly joined by a thick callosity, columcllar vA^ 

 dilated, almost covering the umbilicus. 



Chemnitz, Concli. Cab. vol. xi. p. 217. pi. 20s. f. 2051-2. 

 Helix vesicalis, Lamarck. 

 LeionlviiKi vesiraliit, Swainson. 



Hal). Mailagascar. 



Among the peculiarities of this species may l>c chiefly 



noticed the coiicavely impressed growth of the last whorl 



in the vicinity of the umbilicus. 



Species 171. (Fig. n, A, Mus. Cumin, i 



Helix finiDOTiANA. //»■/./«/ 

 orald, leiiuiruld, undiqiif miii 

 tailed, iiigrirnHle bifaxriald ; ipird parruld, 



bund; ""■ 

 nijiidi'^^i 



1S,51. 



- IS- 



niglo- 



