ANCET : ON HAWAIIAN MOLLUSCA. 125 



a form nearly allied to it, but not Gould's lyrata, under the latter 

 name. A very similar form was found in a subfossilized condition in 

 the Waimea district, Hawaii, by Professor Henshaw, and I can scarcely 

 sever it from my species, though it is somewhat less obese and the 

 riblets are stronger. 



LvROPrPA CLATHEATTILA, n.sp. PI. YII, Fig. 19. 



Testa sinistrorsa, oblonga, rimato-perforata, opaca, subsericea, in- 

 tense purpureo-nigra, concolor, subtenuis, apice excepto liris acutis 

 lamellosis obliquis, inter se distantibus (12 in ultimo anfractu) sculpta; 

 prseterea lineis elevatis membranaceis perparum prominentibus, sed in 

 duobus anfractibus ultimis prsesertim, in intervallis cincta et eleganter 

 clathratula. Spira ovata, obtusa. Anfractus 5 convexi, sutura im- 

 pressa discreti, lineis incrementi sub valida lente notati, ultimus prope 

 aperturam impressione parum distincta suturae parallela instructus, 

 circa perforation em vix angulatus, ovatus, parum attenuatus. Aper- 

 tura subobliqua, appressa, irregulariter ovata, superne extus angulata, 

 5 lamellis vel plicis obstructa, scilicet 2 laminis parietalibus, quarum 

 una submediana, libera et secunda brevior, magis extera cum margine 

 conjuncta; columellari profunda semilunar!, oblique intuenti con- 

 spicua ; palatalibus 2 longis, supera marginem fere attingente, infera 

 magis remota, sulco extero superficiali correspondente. Peristoma 

 expansiusculura, purpureo-fuscum, marginibus superne approximatis 

 sed baud continuis. 



Long. 2"25, lat. l"5mm. 



Hah. — Olaa, Hawaii, cum prsecedente (Thaanum). 



The fine spiral cuticular riblets recorded in the description are very 

 deciduous, and visible only in very fresh specimens. The species is 

 quite distinct from Z. lyrata and more like the following. 



Lteopupa carbonaeia, n.sp. PI. YII, Fig. 21. 



Testa sinistrorea, ovata, solidula, costulis exceptis hand nitida, 

 intense nigro-fusca, aperte perforata, opaca, summo excepto oblique et 

 valide lirata, liris in medio subarcuatis, basi subflexuosis. Spira 

 oblongo-conoidea, obtusa, apice sat minuto. Anfractus 6 convexi, 

 sutura impressa, ultimus ad aperturam longiuscule tantisper sub- 

 ascendens, basi sulco brevi lamellae palatali inferse correspondente 

 constrictus, subattenuatus, antice circa perforationem obtuse sub- 

 cristatus, liris ca. 17 costatus. Apertura fere recta, cum peristomate 

 fusco-tincta, continua, irregulariter ovato-truncata, supra externe 

 sinuata, tum angulata, lamellis ac plicis coarctata, scilicet : angulari 

 1 longa, lamelliformi, cum peristomate connexa ac sinulum formante ; 

 parietal! 1 mediana, praecedenti parallela, profundius posita atque 

 spiraliter volvente ; columellari 1 profunda, semilunari ; tandem pala- 

 talibus 2, supera longa, suturse parallela et prope marginem desinente, 

 infera profundiore, breviore, paululum subdivergente. Peristoma con- 

 tinuum, undique expansum, subincrassatum. 



Long. 2-5, lat. 1"5, alt. apert. vix 1 mm. 



Hab. — In valle Nuuanu, prope Honolulu, Oahu (Thaanum). 



Another modification of the same type, of very dark colour. 



