20 



Chlorostoma rugatum. T. solida, depressa, ovato-conica, fusco- 

 nigra, striis incrementi lamellosis ; anfr. 6 adniodum convexis, postieis 

 transversim striatis, antieis plicis ad suturam tuberculosis in uudulas 

 obliquas diA^aricantes desinentibus ornatis ; basi convexo, spiraliter 

 striato, regione umbilicali impresso, imperforato, albido ; dente colu- 

 mellari acuto : apertura magna, rotundata ; fauce argentatii. Diame- 

 ters about one inch. Inhabits Hakodadi Bay and Simoda. W. S. 



Closely allied to C. nigerrima. 



Chlorostoma achates. T. pyramidalis ad peripheriam acute 

 angulata, levis vel striis incrementi solum insculpta, ex olivaceo 

 cinerascens ; anfr. 5 supernis undulatis, ultimo expanso, concavo ; 

 basi concavo, polito, olivaceo lineis albidis radiato, late et profunde 

 perforato : apertura magna ; labro acuto secundum peripheriam valde 

 prolongato ; columella subdentata. Diam. 1.75, poll. ; axis, 1.50 poll. 

 Inhabits Simoda. W. S. 



The jDeculiar agate-striped base is quite characteristic. 



Chlorostoma uxdatella. T. parva, depressa, ovato-conica, 

 nitidula, nigra, striis tenuibus volventibus et plicis acutis obliquis 

 divaricantibus ornata ; anfr. 6 convexiusculis ad peripheriam angula- 

 tis ; basi convexiusculo, late perforato (interdum fere clauso) ; colu- 

 mella dentata, alba ; labro acuto, nigro cretaceo submarginato ; fauce 

 iridescente. Diam. 15; axis, 10 millim. Inhabits Ousima, Kagosima, 

 and Taneogosima, on surf-washed rocks at low-water mark. AV. S. 



MoNODOXTA GLABEATUM. T. globoso-conica, crassa, polita, fusco- 

 viridis, interdum ad verticem nigrescens et ad peripheriam pallidior, 

 ubique sulcis 4-5 cincta, interspatiis tessellatim sulcatis ; anfr. 7 

 convexis : apertura ampla, rotundato-ovata, alba ; labro Intus sulcato ; 

 dente columellari acuto, sulcato. Axis, 15; diam, 15 millim. China 

 Seas. AV. S. 



Has a general resemblance to, and may be a variety of, M. tuher- 

 culata ; but its rubbed look, tessellated rather than papillated surface, 

 and shorter axis distinguish it. 



GiBBULA FUCATA. T. parva, orbicularis, depressa, supra levis, 

 infra concentricc striata, livido-cinerea strigis rubris vel fuscis satura- 

 tiori marginatis ad peripheriam angulatis et subtus interdum tessellatis 

 variegata, sub crusta calcarea, iridescens ; anfr. 5 declivibus ; sutura 

 conspicua ; basi arctissime perforato : apertura ampla, ovata ; colu- 

 mella arcuata, subreflexa. Diam. 7 ; axis, 5 millim. Inhabits ? 



GiBBULA REDiMiTA. T. parva, ovato-conica, ventricosa, tenuis, 

 sub crusta, calcareu argentata, liris remotis planulatis (ad spiram 5) 

 cincta, pallide incarnata, liris rufo et albo articulatis ; anfr. 7 veutri- 

 cosis, tabulatis ; basi rotundato, vix fissurato : apertura rotuudato- 



