128 



tibiis, ultimo medio zond nigricante, deorsum dilutd, ornato ; 

 suturd lined i?npressd tnarginatd ; aperturd obliqud, ampld, 

 transverse lunari-ovali, intus margaritaced, fascid pellucente ; 

 peristomate simplice, acuta, margine columellari in laminam 

 brevem, triangularem, umbilicum semitegentem, rejlexo. 



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



Hah. in insula Borneo. 



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

 nitidd, minutissimh striatuld, lineis confertis, concentricis, im- 

 pressis sub lente minutissime decussatd, rufo-fuscd vel pallide 

 corned ; spird brevissitne conoided, apice subelevato ; suturd 

 submarginatd ; anfractibus 7 vix convexiusculis, sensim accres- 

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

 dente, basi paulo convexiore ; aperturd depressd, latd, lunari ; 

 peristomate simplice, recto, acuto, margine columellari supra 

 perforationem brevissimh rejlexo. 



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

 Hab. ad Axim in littore occidentali Africse. 



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



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

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

 convexiore ; umbilico lato, dimidium feri diametri occupante ; 

 aperturd parum obliqud, lunari-rotundatd ; peristomate sim- 

 plice, recto, tenui, marginibus conniventibus. 



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



Hab. in insulis Sandwich. 



11. Helix JAcauiNOTi, Pfr. H. testd iimbilicatd, fornicato- 

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

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

 angustis, omnibus carinatis {cai'ind exsertd, compressd, costis 

 decurrentibus denticulatd), ultimo basi vix convexiusculo, radia- 

 tim striato ; umbilico extus lamind horizontali coarctato, intus 

 lato ; aperturd depressd, seeuriformi, lamellis 6 intrantibus 

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

 margine basali profundis, vix conspicuis ; peristomate simplice, 

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

 cumclaudentem continuato. 



Diam. maj. 9, min. 8i, alt. 5 mill. 



Hab. in insula Tahiti, et in insuUs Marquesas. 



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

 distanter arcuato-costatd et sub lente minutissime spira/iter 

 striatd, fusculd, brunneo-tessellatd ; spird fornicatd, superne 

 depressd ; anfractibus 8y angustis, carinatis, ultimo infra pe- 

 nultimum recedente, tertiam pagince inferce penultimi partem 

 liberam relinquente, basi vix convexiusculo, obsolete radiatim 

 costato, distinctius concentrice striato; umbilico lato, extus 

 lamind horizontali coarctato ; aperturd depressd, seeuriformi. 



