388 



Most nearly related to C assimilata, C. B. Ad., but its form is 

 more tapering and its posterior keel larger. 



Cerithiopsis aurantiaca. T. minuta, ovata, flavido-auran- 

 tia ; anfr. nucleosis lineis spiralibus et radiantibus decussatis ; anf. 

 normalibus 5 planatis carinatis ; carinis quoad spiram duabus vali- 

 dis obtusis baud remotis ; altera infra peripheriam ; altera denique 

 circa basin ; laminis longitudinalibus circ. 16 carinas decussanti- 

 bus, tuberculosis ; sutura inconspicua : apertura? (fracta). Axis 

 2 ; diam. l-f- millim. Inhabits China Seas. W. S. 



Resembles C. pupiformis from Mazatlan, but differs in the de- 

 tails of sculpture. 



Cerithiopsis se3IIpicta. T. minuta, crassa, ovata, albida, 

 bizonata ; anfr. 7 bicarinatis, carinis obtusis, tuberculatis, quarum 

 posterior albida, anterior balaustina sunt; tuberculis circ. 16 vali- 

 dis elongatis ; carina ante peripheriam, altera denique ad basin : 

 apertura quadrata ? (fracta). Axis 2.5 ; diam. 1 millim. Inhabits 

 China Seas. W. S. 



Resembles C. sorex from Mazatlan, except in sculpture. 



Cerithiopsis rugosa. T. turrito-conica, rudis, cinerea ; anfr. 

 12-[- carina mediana et altera anticali cinctis, interspatio concavo 

 et laminis ad carinas dilatatis clathrato ; intervallo postico convexo 

 obverse clathrato ; basi lineis incrementalibus solum insculpto ; 

 sutura inconspicua : apertura subquadrata ; rostro abbreviato ; 

 columella contorta. Axis 15 diam. 4 millim. Inhabits China 

 Seas. W. S. 



Allied in form and size to C. terebellum, C. metula, and C. punc- 

 tatum, but very differently sculptured. 



Triforis intercalaris. T. alba, subulata ; anfr. nucleosis 

 5, primo IsBvi ceteris unicarinatis ; normalibus 16 planatis, carinis in 

 spira cinctis, primum duabus remotis rotundatis, dein altera minori 

 intermedia sensim crescente donee alteris sequante ; ad peripheriam 

 denique quarta ; clathris ad 20 carinas decussantibus, intersection- 

 ibus tuberculosis ; carinis duabus circa basin et canalem parum 

 tuberculosis : apertura parum expansa ; canalibus apertis, brevi- 

 bus. Axis 6; diam. 1.5 millim. Inhabits China Seas. W. S. 



Triforis interfilatus. T. conico-cylindrica, dilute rufo- 



