128 - 
tibus, ultimo medio zond nigricante, deorsum dilutd, ornato ; 
suturd lined impressd marginatd ; aperturd obliqud, ampld, 
transverse lunari-ovali, intus margaritaced, fascid pellucente ; 
peristomate simplice, acuto, margine columellari in laminam 
brevem, triangularem, umbilicum semitegentem, reflexo. 
Diam. maj. 52, min. 42, alt. 25 mill. 
Hab. ix insula Borneo. 
9. Hexrx arricana, Pfr. H. testd perforatd, depressd, tenui, 
nitidd, minutissime striatuld, lineis confertis, concentricis, im- 
pressis sub lente minutissime decussatd, rufo-fuscd vel pallide 
corned ; spird brevissime conoided, apice subelevato ; suturd 
submarginatd ; anfractibus 7 vix convexiusculis, sensim accres- 
centibus, ultimo carinato (carind antic obsoletd), non descen- 
dente, basi paulo convexiore ; aperturd depressd, latd, lunari ; 
peristomate simplice, recto, acuto, margine columellari supra 
perforationem brevissimeé reflexo. 
Diam. maj. 26, min. 23, alt. 13 mill. 
Hab. ad Axim in littore occidentali Africee. 
10. Hextrx sanpvicensis, Pfr. H. testd umbilicatd, discoided, 
striatd, nitiduld, luteo-corned ; spird pland ; suturd impressd ; 
anfractibus 5-6 lenté accrescentibus, ultimo depresso, basi vix 
conveviore ; umbilico lato, dimidium fere diametri occupante ; 
apertura parum obliqud, lunari-rotundatd ; peristomate sim- 
plice, recto, tenui, marginibus conniventibus. 
Diam. maj. 18, min. 15, alt. 5 mill. 
Hab. in insulis Sandwich. 
11. Hexrx Jacauinoti, Pfr. A. testd umbilicatd, fornicato- 
conoided, soliduld, acuté carinatd, confertim arcuato-costatd, 
albo et fusco variegatd ; spird conoided, obtusd ; anfractibus 8 
angustis, omnibus carinatis (carind exsertd, compressd, costis 
decurrentibus denticulatd), ultimo basi vix convexiusculo, radia- 
tim striato; umbilico extus lamina horizontali coarctato, intus 
lato; aperturd depressd, securiformi, lamellis 6 intrantibus 
munitd : 2 in pariete aperturali elongatis, | columellari et 3 in 
margine basalt profundis, vix conspicuis ; peristomate simplice, 
recto, acuto, margine basali in lamellam umbilici introitum cir- 
cumclaudentem continuato. 
Diam. maj. 9, min. 84, alt. 5 mill. 
Hab. in insula Tahiti, et in msulis Marquesas. 
12. Heurx coarcrata, Pfr. H. testd umbilicatd, depressd, 
distanter arcuato-costatd et sub lente minutissime spiraliter 
striatd, fusculd, brunneo-tessellatd ; spird fornicatd, superne 
depressd ; anfractibus 8% angustis, carinatis, ultimo infra pe- 
nultimum recedente, tertiam pagine infere penultimi partem 
liberam relinquente, basi vix convexiusculo, obsolete radiatim 
costato, distinctius concentrice striato; umbilico lato, extus 
lamind horizontali coarctato; aperturd depressd, securiformi, 
