HELIX. 



Plate CXXIV. 



Species 739. (^lus. Benson.) 



Helix acuducta. Hel. tedd minule um/jilicatd, feiiiii, 

 stiperne plano-depressd, subtua rolundald, ftdcescenle- 

 cortied, arcualim costellato-atriatd, drik lineis spiralUma 

 minulu Impresais sub Imie decuiuatd, basi Iteviore ; an- 

 fractibm qu'mque, uUimo acidissimi carinalo, supra el 

 iufra carinam subconcavo-impresso ; aperturd siibqua- 

 dralo-liiHari ; perislomatii tenui, acuto, marline colu- 

 mellari breviler revolulo. 



The scratched Helix. Shell minutely umbilicated, 

 thin, flatly depressed at the upper part, rounded 

 bcueatli, fulvous-horny, arcuately rib-like striated, 

 striaj decussated beneath the lens with minute im- 

 pressed lines, base smoother; whorls five, the last 

 sharply keeled, slightly coneavely impressed above 

 and below the keel ; aperture somewhat s(iuarely 

 lunar; lip thin, sharj), columellar margin shortly 

 turned back. 



Benson, Ann. and ilag. Nat. Hist. 1 S50, vol. v. p. 214. 



llab. In woods on th(^ summits of the Nilgherries ; Jerdon. 



A brittle transparent homy shell sharply keeled in the 

 middle, of which the upper surface is comparatively flat, 

 in part concave, throughout elaljorately finely sculptured, 

 and the under sm-faec is rounded and smoother. 



Species 740. (T"ig. a, b, Mus. Benson.) 



Helix cotyledonis. Hel. testa imper/oratd, subconoi- 

 dm, tenui, lavif/ald, peUucido-corued, rnfo-fuscd, fascid 

 lata epidermidis hjdropkanoe opaco-albce cimjulald ; 

 anfradibus quinque, convexia ; aperturd lunari, labro 

 tenui, acuto. 



The cotyledon Helix. Shell imperforated, subconoid, 

 thin, smooth, transparent horny, red-brown, encircled 

 with a broad opake-white band of hydrophanous 

 epidermis ; whorls five, convex ; aperture lunar, lip 

 thin, acute. 



Benson, Ann. and Mag. Nat. Hist. 1850, vol. v. p. 216. 



llab. Simon's Bay, Cape of Good Hope ; Benson. 



A delicate red-brown transparent shell, distinguished by 

 a band of opnke-white hydrophanous epidermis, after thu 

 manner of the I'lulippine snails. 



Species 741. (Mus. Benson.) 



Helix solcta. Ilel. testa tuiobtecti umbilicala, Jeprtuo- 

 orbiculari, aiitice auboblii/ui productd, pticalo-strialu, 

 opaco-alid, cinereo-tinctd, nigru-punctatd, liiu-d fiucu- 

 rufd cingulatd, apicein versus ticido-purpurascente ; 

 an/ractiiua quinque, ptano-contexia ; aperturd trans- 

 verse lunari, fauce fuaco-rufd, labro tuitimplici, mar- 

 gine columellari rejlexiuaculo. 



The freckled Helix. Shell with a nearly covered um- 

 bilicus, deprcssly orbicular, rather obli(|uely produceti 

 in front, plieately striated, opake white, ash-tingtd, 

 black-dotted, aud encircled with a brown-red line, 

 livid purple towards the apex; whorls five, flatly 

 convex ; aperture transversely lunar, lirown-rcd in 

 the interior, lip nearly simple, columellar maTjjin u 

 little reflected. 



Benson, iVnn. and Mag. Nat. Hist. 1848, vol. ii. p. 158. 



llab. Nilgherries ; Jerdon. 



Of a peculiar ash-tinted opake white, changing to livid 

 purple towards the apex, promiscuously sprinkled through- 

 out with black dots. 



Species 742. (Fig. a, b, Mus. Benson.) 



Helix climacterica. Hel. testa imperforatd, dqiresao- 

 pyramidali, subtus tumidd, sordidi alba ; spird gradatd, 

 apice elevatd; anfradibus octo, supemi arcuatim crt- 

 berrime eoatellato-striatia, deiiide acuti amjulatc-<:a- 

 rinatli, ultimo baai concexo, medio excavate ; aperturd 

 transverse lunari, ad carinam subsinuatd ; peristomatr 

 aimplici, aubincrassato. 



The stair Helix. Shell imperforated, deprcssly pyra- 

 midal, swollen beneath, dirty-white ; spire slop-like, 

 raised at the apex ; whorls eight, vcrj- closely arcu- 

 ately rib-like striated at the upper part, then sharply 

 angularly keeled, last whorl convex at the base, ex- 

 cavated in the middle ; aperture tninsvers<ly lunar, ii 

 little siuuated at the keel ; Up simple, rather thick- 

 ened. 



BENSON,Journ. Asiatic Soc. of Calcutta, 18:!t>, vol. v. p. 352. 



llab. East Frontier of Bengal. 



A very peculiar species, in which each whorl drops one 

 below the other throughout, so as to form on the spirt- ii 

 keel-bound stair, ascending step by step to the apex. 



August, 1852. 



