HELIX. 



Plate LXXX. 



Species 421. (Mus. Cuming.) 



Helix Typinsana. Hel. les/d late uiniilicaid, dcpresso- 

 orbiculari, suidiscoided, ohlique plica/o-siriaid, fmco- 

 oUvaced ; spird obtusd ; aitfraclibus sex ad septem, an- 

 guslii, plaiio-coHvexi-s, uUimo roiundato, fascia alb'uld 

 cingnlalo ; iimbiUco percio, perspeclivo ; aperturd par- 

 miHCuld, subcirculari ; perkiomaie rejlexo, cameo, mar- 

 ginibus valde conniventibiis. 



TuE Typiksan Helix. Shell broadly umbilicated, dc- 

 pressly orbiculiir, subdiscoid, obliquely plicately stri- 

 ated, brownish-olive ; spire obtuse ; whorls six to 

 seven, narrow, flatly convex, last whorl rounded, en- 

 circled with a whitish band ; umbilicus open, per- 

 spective ; aperture rather small, nearly circular ; lip 

 reflected, flesh-coloured, margins nearly approximat- 

 ing. 



Adams and Heeve, Zool. Voy. Samarang, Moll. p. GO. 

 pi. 14. f. 3a,i. 



Hab. Island of Ty-pin-saii, Meiacoshinia Group (under 

 decayed leaves in the ])iue-woods) ; Adams. 



Of this Solarium-\\V^ form there are three distinct species 

 in the centre column of the present plate. 



Species 422. (Mus. Cuming.) 



Helix grata. Hel. tesld angustc umbiUcald, trochiformi, 

 tenui, slriald, citrind, epidennide fulvd fasciatim ob- 

 ductd ; spird conicd, aciitd; anfraclibm quinque, pla- 

 niusculli, uUimo acute cariiia/o, basi convexiuscido ; 

 columelld oblique descendenle, ddatald ; apvrlurd sub- 

 rhombed ; peristomale simplici, late expanso, margiiie 

 columellari dilalato, arcuaiim rejlexo, nmbllicum occul- 

 iante, nee obtegeide. 



The welcome Helix. Shell narrowly umbilicated, tro- 

 chus-shaped, thin, striated, lemon-coloured, covered 

 with a fulvous-banded epidermis ; spire conical, 

 sharp ; whorls five, rather flat, the last sharply 

 keeled, rather convex at the base ; columella descend- 

 ing oblicpiely, dilated ; aperture sub-rhomboid ; lip 

 simple, broadly expanded, columellar margin dilated, 

 arcuately reflected, concealing but not covering the 

 umbilicus. 



Carocolla grata, Michelin, Mag. de Zool. 1S31. Moll. pi. 9. 

 Uelix acuta, Qiioy and Gaimard. 



Hab. Port Dorcy, New Guinea ; Quoy. 



March, 



The sharp keel of this interesting and rare species is 

 edged with opakc white, which on the spire is faintly seen 

 in the place of the suture. 



Species 423. (Mus. Cuming.) 



Helix dictyoides. IM. testa umbiUcald, deprettd, tub- 

 letiticulari, olliqui plicalo-slriald, teiiuiciild, diaphand, 

 pallide corned, fasro subliliter reticulatd, maculis cat- 

 taneis juxta suturam el carinain ornatd ; spird lali co- 

 nuided ; an/raclibus septem, vix conceiiusculi*, uUimo 

 acute carinato, antice non descendehte ; aperturd *u6- 

 verlicali, deprevid, luuari ; peristomale simplici, mar- 

 gine columellari breviter dilalato, basaii tinuoto, re- 

 Jlexiusculo. 



The net-like Helix. Shell umbilicated, depressed, 

 somewhat lens-shaped, obliquely plicately striattd, 

 very thin, diaphanous, pale honiy, finely reticulat<.-d 

 with brown and ornamented next the suture and keel 

 with chestnut blotches ; spire broadly conoid ; whorls 

 seven, rather convex, the last shaqily ke<'lcd, not de- 

 scending in front ; aperture subvertical, depressed, 

 lunar ; lip simple, columellar margin shortly dilated, 

 basal margin sinuous and slightly reflected. 



Pfeiffeb, Pro. Zool. Soc. 1S46. p. 111. 



Hab. New Guinea; Incc. 



Curious, blotched throughout with irregular stragglini; 



chestnut spots next the keel and suture. 



Species 424. (Mus. Cuming.) 



Helix vermis. Ilel. testd latissimi fl profundi mmbiliea- 

 Id, discoided, plaiio-depressd, pallide fnlcesceHte ; spird 

 convexo-pland ; aifraclibus septem ad octo, angustit, 

 ultimo obtuse carinato, basi roiundato ; aperturd eircu- 

 lari, maryinibus connivenlibui ; peritlomole tenm, If- 

 viler rejlrxo. 



The wokm Helix. Shell very broadly and deeply um- 

 bilicated, discoid. ilr|)r<-ss»'d, pale fulvous ; spire con- 

 vexlv flattened ; whorls seven to eight, narrow, last 

 whorl obtusely keeled, rounded at the base ; aperture 

 circular, margins approximating; Up thin, slightly re- 

 flected. 



Hab. Moiacoshima Group 



This species, which is certainly distinct from //. Typin- 

 1S52. 



