HELIX. 



Plate CXCV. 



Species 1367. (Miis. Cuming.) 



Helix solidula. Hel. tesid vix uniiiUcald, depreuo-co- 

 noided, funcd, oblique plicalo-nlriatd, iiirik elecatin ; 

 »pira obtu.id ; aiifractiiiin nex, plwialU, atl periphtrriam 

 carinatk ; aperlurd anymti luiiari, labro simplici, ad 

 columellam leviter rcjlexo. 



The rather solid IIeli.x. Shell scarcely umbilicated, 

 depressly conoid, brown, obliquely plicately striated, 

 stria; raised; spire obtuse; whorls six, flattened, 

 keeled at the periphery ; aperture narrowly luuar, lip 

 simple, a little reflected at the columella. 



Pfeifkeu, Pro. Zool. Soc. 1854. 



Uab. ? 



A firm, conoid species, scarcely umbilicated, sculptured 

 with fiue raised stria;. 



Species 1368. (Mus. Cuming.) 



Helix CtJMUHJS. Hel. testa oblecCe umhilicatd, orbiculari, 

 pellucido-comed, dense elevato-striatd ; spird depresso- 

 convexd ; anfraclWus quiiique,uUinu) leciter cariiiato ; 

 aperlurd oblique luiuiri, labro simplici, ad columellam 

 paululum rejlexo. 



The pile Helix. Shell with a covered umbilicus, orbi- 

 cular, transparent horny, densely elevately striated ; 

 spire depressly convex ; whorls five, the last slightly 

 keeled ; aperture obliquely lunar, lip simple, a little 

 reflected at the columella. 



Pfeiffer, Pro. Zool. Soc. IS.i-i. 



Hab. Banks of Planning Kiver, East Australia. 



A simple transparent horny shell, a little excavated 

 around the umbilicus, which is very small, and covered 

 over by the slight callously reflected expansion of the co- 

 iumellar margin. 



Species 1369. (Mus. Cuming.) 



Helix Cayennensis. Uel. testa late perspective tinUii- 

 licaln, depresso-orbiculari, snidiscoided, tenui, hi/aliiid, 

 densii oblique striata, epidermide corned lutescente in- 

 duld; spird leciter coiwexd, sulurd impressd; anfrac- 

 tihus quiiique, rotundatis ; aperturd partd, circulari, 

 labro simplici. 



The Cayenne Helix. Shell broadly perspcctivcly um- 

 bilicated, depressly orbicular, subdiscoid, thin, hyaline, 



densely obliquely striated, covered with a yellowish- 

 horny epidermis ; spire slightly convex, suture im- 

 pressed ; whorls five, rounded ; aperture small, cir- 

 cular, lip simple. 



Pfeiffer, Pro. Zool. Soc. 1:S»4. 



llali. Cayenne. 



A spiral narrow-whorlcd species, nearly discoid, with an 



open perspective umbilicus. 



Species 1370. (Mus. Cuming.) 



Helix Stimpsoni. Uel. testa auguste profundi umiili- 

 catd, depreaw-globosd, tenuiculd, suhcomed,fulr:^sceHle- 

 fused, dense elevato-striatd ; aufractibus quinque, coh- 

 vexis, ultimo subinflato, et leviter carinato ; aperturd 

 subcirculari, laJiro rejlexo, cameo Undo. 

 Stimpsgn's Helix. Shell narrowly deeply umbilicated, 

 depressly globose, rather thin, somewhat homy, yel- 

 lowish-brown, thickly elevately striated ; whorls five, 

 convex, the last somewhat inflated, faintly keeled ; 

 aperture subcircular, lip reflected, flesh-tinged. 

 Pfeiffer, Pro. Zool. Soc. 1334. 

 Eab. China. 



A depressly globose horny shell, characterized by a 

 rounded aperture with a conspicuously reflected flesh- 

 tinged lip. 



Species 1371. (Mus. Cuming.) 



Helix calculus. //''/. tesld perampUter et latissimi 

 umbilicatd, planissime drpressd, utrinque concard, oh- 

 guste discoitled, lutescente-olivaced, liueis rufit utidaii* 

 decustald ; aufractibus octo, angustissimis, npra et 

 infra angulatis ; aperturd minutd, lunari. 



The pebble Helix. Shell very largely and broadly 

 umbilicated, very flatly depressed, concave on both 

 sides, narrowly discoid, yellowish-olive, crossed with 

 waved red lines ; whorls eight, extremely narrow, 

 angular above and below ; aj)crture vcrj' small, lunar. 



Pfeiffer, Pro. Zool. Soc. 1854. 



Hab. ? 



This remarkably discoid species has the most complete 



Ammonite-form of any of the genus, and the cross waved 



lines almost give it the ap]x.>arancc of being chambered. 



September, 1854. 



