Zoological Society. 293 



simpliee, recto, margine columellari ad umbilicum in laminam 



br event, triangularem reflexo. 

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

 Hub. in insula Borneo, var. pallida in insulis Philippinis. 



8. Helix borneensis, Pfr. H. testd obliquh perforatd, de- 

 pressd, tenuiusculd, striis incrementi distinctis et lineis obli- 

 quis, impressis, crebns deciissatd, saturate fulvd ; spird vix ele- 

 vatd, obtusd ; anfractibiis Aparum convexis, celeriter accrescen- 

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

 suturd lined impressd marginatd ; apertiird obliqud, ampld, 

 transversa lunari-ovali, intus margaritaced, fascid pellucente ; 

 peristomate simpliee, acuto, margine columellari in laminam 

 brevem, triangularem, umbilicum semitegentem, reflexo. 



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

 Hab. in insult 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 brevissimk conoided, apice subelevato ; suturd 

 submarginatd ; anfractibus 7 vix convexiusculis, sensim accres- 

 centibus, ultitno carinato (carind antici obsoletd), non descen- 

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

 peristomate simpliee, recto, acuto, margine columellari supra 

 perforationem brevissimh reflexo. 



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

 Hab. ad Axim in littore occidentali Africse. 



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

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

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

 convexiore ; umbilico lato, dimidium fere diametn occupante ; 

 aperturd parum obliqud, lunari-rotundatd ; peristomate sim- 

 pliee, recto, tenui, marginibus conniventibus. 



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

 Hab. in insulis Sandwich. 



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

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

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

 angustis, omnibus carinatis {carina exsertd, compressd, costis 

 decurrentibus denticulatd), ultimo basi vix convexiuscido, radia- 

 tim striato ; umbilico extus lamind horizontali coarctato, intus 

 lato ; aperturd depressd, securiformi, lamellis 6 intrantibus 

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

 margine basali profundis, vix conspicuis ; peristomate simpliee, 

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

 cumclaudentem continuato. 



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



Hab. in insula Tahiti, et in insulis Marquesas. 



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



