Zoological Society. 293 



simplice, recto, margine columellari ad umbilicum in laminam 



brevem, triangidarem reflexo. 

 Diam. maj. 53, min. 45, alt. 30 mill. 

 Hal), in insula Borneo, var. pallida in insulis Philippinis. 



8. Helix borneensis, Pfr. H. testd obliqu^ perforata, de- 

 pressd, tenuiuscidd, striis incrementi distinctis et lineis obli- 

 qvis, impressis, crebris decussatd, saturate fid vd ; spird vix ele- 

 vatd, obtusd ; anfractibus Aparum convexis, celeriter accrescen- 

 tibus, idtiino medio zond nigricante, deorsvm dihitd, ornato ; 

 suturd lined impressd marginatd ; apertiird obVupid, ampld, 

 transverse lunari-ovali, intus margaritaced, fascid pellucente ; 

 p)eristomate simplice, acuto, margine columellari in laminaiu 

 brevem, triangidarem, vmbilicum semitegentem, reflexo. 



Diam. maj. 52, min. 42, alt. 25 mill. 

 Hab. in insula Borneo. 



9. Helix africana, Pfr. H. testd perforatd, depressd, tenui, 

 nitidd, minutissime striatuld, lineis confertis, concent rids, im- 

 pressis sub lente minutissime decussatd, rufo-fuscd vel pallide 

 corned ; spird brevissime conoided, apice siibelevato ; suturd 

 submarginatd ; anfractibus 7 vix convexiuscidis, sensim accres- 

 centibus, idtimo carinato {carind antice obsoletd), non descen- 

 dente, basi paido convexiore y aperturd depressd, latd, hinari ; 

 peristoma^te simplice, recto, acuto, margine columellari supra 

 perforationem brevissime reflexo. 



Diam. maj. 26, min. 23, alt. 13 mill. 

 Hab. ad Axim iu littore occidentali Africte. 



10. Helix sandvicensis, Pfr. H. testd umbilicatd, discoided, 



striata, nitiduld, luteo-corned ; spird pland ; suturd impressd ; 

 anfractibus 5-6 lente accrescentilius, ultimo depresso, basi vix 

 convexiore ; umbilico lato, dimidium fere diametri occupante ; 

 aperturd parum obliqud, lunari-rotundatd ; peristomate sim- 

 plice, recto, tenui, marginihus conniventibus. 



Diam. maj. 18, min. 15, alt. 5 mill. 



Hab. in insulis Sandwich. 



11. Helix jACauiNOTi, Pfr. H. testd umbilicatd, fornicato- 

 conoided, solidulci, acute carinatd, confertim arcuato-costatd, 

 albo et fusco variegatd ; spird conoided, obtusd; anfractibus 8 

 angustis, omnibus carinatis {carina exsei'td, compressd, costis 

 decurrentibus denticidatd), idtimo basi vix convexiusculo, radia- 

 tim striata ; umbilico extus lamina horizontali coarctato, intus 

 lato ; aperturd depressd, securiformi, lamellis 6 intrantibus 

 munitd ; 2 in pariete aperturali elongatis, 1 columellari et 3 in 

 margine basali profimdis, vix co7ispicuis ; peristomate simpilice, 

 recto, acuto, margine basali in lamellam umbilici introitum cir- 

 cumclaudentem continuato. 



Diam. maj. J), min. Hi, alt. 5 mill. 



Hab. in insula Tahiti, et in insulis Marquesas. 



12. Helix coarctata, Pfr. H. testd umbilicatd, depressd, 



