138 



anfr. 4; satura canalicuhita : aperture f totius longitudinis cito 

 dilatata; columella plicis eminentibus bifidis rutis munita. Axis 

 6 ; diam. 3 millim. Inhabits Hong Kong Harbor, in 10 fathoms, 

 shelly sand. "W. S. 



Most like 0. mutica, but the pillar lip differs. 



Genus JEsopus. Animal albidum ; solea antice emarginata, 

 postice obtusa operculum corneum flabelliforme gerente ; capite 

 parvo ; vibraculis eurtis obtusis ; oculis externis medianis ; siphone 

 lato, brevissimo. Testa fusiformis, gibbosa, antice late truncata ; 

 apertura lunata, angulo postico callo impleto ; columeliri simplici 

 vitreo induta; sutura prope aperturam abnormaliter arcuata. 



The curious curve of the suture near the posterior angle of the 

 aperture, as if it had been drawn backward, thereby pulling 

 back this angle and curving the last whorl downward, is very pe- 

 culiar. The form and aspect of the shell, and the structure of 

 the animal, indicate its place to be intermediate between Mitra 

 and Columbella. 



JEi. japoxicus. T. parva, solidula, castanea, prope suturam 

 pallescens, striis volventibus incisa ; anfr. 7 tumidulis, posticis 

 plicatulis, ultimo ovali, late truncato, | totius long, testae ade- 

 quante : apertura lunata ; peritremate reflexo ; columella lamina 

 vitrea lata subereeta induta. Axis 7 ; diam. 2 millim. Inhabits 

 Kagosima Bay, at o fathoms, sandy bottom. W. S. 



The only species as yet found, but quite peculiar enough to 

 distinguish it from all other shells. 



This very distinct genus, both as to shell and animal, plainly 

 belongs to the family Amphiperasidce, having the form and lip of 

 Ovula, while the base is traversed by sharp transverse ridges, as 

 in Cyprcea, passing over the pillar into the aperture. The broad 

 and short tentacles, the position of the ayc^, and the long, obtuse 

 foot of the animal, are quite peculiar. 



Genus Ckitiie. Animalis discus elongatus, antice truncatus, 

 angulis vix productis, postice obtusus ; collum dimidiam latitudinis 

 disci, antice bifurcatum ; tentaculis brevibus triangularibus, oculis 

 minutis externis, basalibus. Testa porcellana, convoluta, utrinque 

 rostrata : apertura angusta, arcuata; labro simplici ; ventre laminis 

 transversis acutis totus arato. 



