143 



Resembles 0. pupiformis from Mazatlan, but differs in the de- 

 tails of sculpture. 



Cerithiopsis semipicta. 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 hevi ceteris unicarinatis ; normalibus 16 planatis, carinis in 

 spira cinctis, primum duabus remotis rotundatis, dein altera minori 

 intermedia sensim crescente donee alteris aequante ; 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- 

 fusca ; anfr. 10— |— bicarinatis ; carinis acutis, tertia ad suturam ; 

 inter carinas leves, tota superficie clathrata, clathris radiantibus 

 circ. 30 rotundatis, interstitiis angustis ; super clathras, inter carinas 

 spirales, filo parvo spirali ; circa basin carinis duabus rotundatis 

 baud clathratis ; basi radiatim rugoso : apertura expansa, suborbi- 

 cularis ; labro a carinis 4 et aliis intercalantibus eleganter undato ; 

 canalibus apertis, antico elongato, toi'tuoso, postico brevi, satis pro- 

 fundo. Axis .3 ; diam. .06-4- poll. Inhabits Hong Kong Harbor. 



w. s. 



