416 Mr. E. A. Smith on 
Adelomorpha Canefriana. (Pl. IX. figs. 17, 18.) 
Testa turbinata, anguste umbilicata, pallide rufescens, tenuissime 
spiraliter striata; anfractus 5, perconvexi, ultimus rotundatus, 
antice vix descendens ; apertura subcircularis, intus dilute ru- 
fescens ; peristoma simplex, tenue, haud expansum, pallidum, 
margine columellari obliquo, fere rectilineare, leviter incrassato, 
superiore prope suturam prominente. Operculum calcareum, extus 
valde concavum, album, anfractibus 5, utrinque carinatis, trans- 
versim fortiter striatis, sutura canaliculata sejunctis, infra luteum, 
lineis numerosis tenuibus, curvatis, radiantibus, griseis ornatum, 
margine externo trisulcato et carinato. 
Diam. maj. 73 millim., min. 6; alt. 8. 
Hah. Kapaur. 
Larger and more globose than A. tunicata, Canefri, and 
also readily distinguishable by its remarkable operculum. 
Adelomorpha globosa. (PI. IX. fig. 19.) 
Testa turbinato-globosa, anguste umbilicata, sordide lutescens, 
spiraliter tenuissime striata; anfractus 5, perconvexi, sutura 
profunda sejuncti, ultimus globulosus, antice vix descendens ; 
apertura subcircularis ; peristoma tenue, simplex, acutum, palli- 
dum, margine columellari subincrassato, vix reflexo. Operculum 
caleareum, album, extus concavum, anfractibus quindte lineis 
incrementi tenuissimis striatis. 
Diam. maj. 5 millim., min, 43 ; alt. 43. 
flab. Kapaur. 
It differs from A. Canefriana in its smaller size, less 
elevated spire, deeper suture and operculum. A. tunicata 
appears to have a similar operculum, but the shell is very 
different in form. 
Ditropopsis papuana, gen. et sp. n. 
(PL. 1X. figs. 20-23.) 
Testa depressa, orbicularis, carinata, late et perspective umbilicata, 
olivaceo-cornea, nitens, semipellucida; spira convexa, depressa ; 
anfractus normales 33, convexiusculi, ad suturam carino-marginati, 
ultimus haud descendens, ad medium et circum umbilicum carina 
acuta, definita, valde prominente, pallida instructus; umbilicus 
infundibuliformis, spiraliter liratus et carinatus, epidermide 
tenui, striata, indutus ; apertura irregulariter pentagona, parva ; 
peristoma leviter incrassatum et expansum, intus ad carinas 
canaliculatum, haud continuum, marginibus callo tenuissimo 
junctis. Operculum corneum, circulare, extus rufo-fuscum, 
