HELIX.— Plate CLXXIX. 



A very xlcpressed hard horny species, encircled above 

 and below the periphery with a conspicuous red band. 



Species 1230. (Mus. Pfeiffer.) 



Helix Binneyana. Uel. testa late aperte umbilicatd, 

 depressd, siMUcoided, conieo-lulescenle, strigU casta- 

 nets oblique inidatis siiltus tUluth pictd, striis longi- 

 tiidhialiliHS et splralibiis minitth siib leiile decussald ; 

 spird pland, sutttrd impressd ; anfractibus quinque, 

 contexts ; aperturd peroblique lunari, labro acuta, mar- 

 yine basali re/textunculo. 



Binney's Helix. Shell broadly openly umbilicated, de- 

 pressed, subdiscoid, painted with obliquely waved 

 chestnut streaks, diluted beneath, decussated beneath 

 the lens with minute longitudinal and spiral striae ; 

 spire flat, suture impressed ; whorls five, convex ; 

 aperture very obliquely lunar, lip sharp, basal margin 

 a little reflected. 



Pfeiffer, Zeitschrift fiir Malac. 1817, p. 13. 



Hab. Island of Chiloe; E. B. Philippi. 



A discoid Ci/clostoma-Mke species, richly painted on the 

 spire with obliquely waved chestnut streaks. 



Species 1231. (Mus. Pfeiffer.) 



Hklix calamechroa. Ilel. testa anguste miibilicald, 

 globoso-depressd, tenui, nit Ida, pellucidd, stramined, 

 transversim regulariter striata, liueis spiralibus tenuis- 

 simis sub lente decussatd; anfractibus quinque ad sex, 

 sensim accrescent ibm ; aperturd lunari, labro simpUci, 

 acuta. 



The straw-coloured Helix. Shell narrowly umbili- 

 cated, globoscly depressed, thin, shining, pellucid, 

 straw-coloured, transversely regularly striated, decus- 

 sated beneath the lens with very fine spiral lines; 

 whorls five to six, increasing gradually ; aperture 

 lunar, lip simple, shaq). 



Jonas, Philippi Abbild. und Besch. Conch, vol. i. p. 17. 

 pi. 3. f. 2. 



Hab. Guinea. 



A delicate straw-coloured species of simple form. 



Species 1232. (JIus. Pfeiffer.) 



Helix SIMULATA. Ilel. testa anguste umbilicatd, globoso- 

 iurbinatd, regulariter costulato-striatd, albidd vet 

 grised, fusco rel spadiceo interrupt!; fasciatd; spird 

 coHoided ; anfractibus quinque, cuncexiusculis ; aper- 



turd lunato-mbcirculari, labro acuta, intui labialo, 

 marginibus appraximatis. 



The allied Helix. Shell narrowly umbilicated, glo- 

 boscly turbinated, regularly rib-like striated, whitish 

 or grey, encircled with interrupted brown or fawn 

 bands ; spire conoid ; whorls five, rather convex ; 

 aperture lunar-subcircular, lip sharp, edged withio, 

 margins approximating. 



Ferdssac, Prodrome, p. 2S9. 



Hab. Syria, Egj'pt, Canarj' Islands. 



Of an opake bluish- white, interruptedly banded and finely 

 rib-striated throughout. 



Species 1233. (Mus. Pfeiffer.) 



Helix PILISIARGO. Hel. testa perspective umbilicatd, de- 

 pressd, supra planiusculd, calcareo-albd, raro fasciatd, 

 carina filosd cingulatd ; anfractibus quinque, conrexi- 

 iisculis ; aperturd rotundatd, labro recto, aaito, iniu» 

 remote sublabiato, marginibus subapproximatis. 



The thread-edged Helix. Shell perspectively umbi- 

 licated, depressed, flat above, chalk-white, rarely 

 banded, encircled with a thread-like keel ; whorls five, 

 rather convex ; aperture rounded, lip straight, sharp, 

 distantly slightly edged within, margins rather ap- 

 proximating. 



ZiEGLER, Rossmiisler Hist. Moll. vol. vi. p. 33. f. 358. 

 Helix Taurica, Partsch. 



Hab. Tauria. 



A chalk-white shell, encircled with a thread-like keel 

 running through the groove of the suture. 



Species 1234. (Mus. Pfeiffer.) 



Helix DETECTA. Hel. testa imperforatd, lenticulari, ra- 

 rinatd,fu.scd, minute elecato-striald ; anfractibus quin- 

 que ad sex, carind late prominente, in omnibus anfrac- 

 tibus sulur/s appressd ; aperturd securiformi, Mro 

 superne simplici, margine basali subinrrassato. 



The detected Helix. Shell imperforated, lens-shaped, 

 keeled, brown, minutely elevatcly striated ; whorls 

 five to six, keel broadly prominent, in nil the whorls 

 appressed to the suture ; aperture hatchct-sliaped, lip 

 simple above, basal margin slightly thickened. 



Feui'ssac MSS. Pfeiffer SymboUr, vol. ii. p. 27. 



Hab. Island of Bourbon. 



A hard depressed dull olive species, with the periphery 

 peculiarly pressed out inio a keel which passes through the 

 spire in the place of the sutiu'c. 



