121 



valva inferior! postiee truncata, disco rimato cardiformi ; limbo 

 radiato, radiis filiformibus admodum articulatis ; margine ciliato. 

 Diam. £ poll, circiter. Adhering to shells dredged in the China 

 Sea. W. S. 



A specimen in Mr. Cuming's collection is much larger. 

 Young specimens are quite destitute of radiating lines. 



Trichotropis ellipsoidea. T. parva, tenuis, ovata, albida, 

 liris quadratis (interspatiis clathratis) cincta ; anfr. 6 ventricosis ; 

 sutura canaliculata ; epidermide tenui, liris ciliatis : apertura 

 ovata, antice acute rostrata ; labro simplici, arcuato ; margine 

 columellari tenui, erecto ; umbilico parvulo. Axis 10 millim. ; 

 diam. 5 millim. Dredged in Hong Kong Bay. W. S. 



Has the aspect of T. inermis, as figured by MiddendorfF, but is 

 smaller, much more elongated, and the pillar and canal are quite 

 different. 



Trichotropis (Iphinoe) coronata. T. ovato-rhomboidea, 

 turrita, tenuis, cinerea, epidermide fibroso ad carinam in fimbriam 

 cii'rosam producto induta ; umbilico lato, profundo, acute margin- 

 ato ; anfr. 6-j- cito crescentibus, postiee tabulatis, ad angulum cari- 

 natis : apertura ovato-triangularis, labro simplici ; columella recta, 

 antice vix reflexa, acuta, subcanaliculata : operculum ovatum, 

 corneum, apice terminali. Long. 25 millim. ; lat. 15 millim. 

 Hab. Arctic Ocean, Straits of Semiavine, 20 fathoms, mud. 



w. s. 



May, perhaps, be T. ciliata, Kruger, which I have not seen. 

 A very curious and elegant species. 



Ringicula denttculata. T. ovata, acuminata, solida, 

 lactea, striis confertis transversis (exilioribus interdum interveni- 

 entibus) insculpta; anfr. 5 ventricosis: apertura angusta ; labro 

 admodum incrassato intus denticulato, fere ad sinum siphonalem 

 interrupto ; plicis acutis, transversis ; callo modico, baud appresso ; 

 dente parietali modico. Axis 5 millim. ; diam. 3.5 millim. In- 

 habits Port Jackson, N. S. W. W. S. 



The numerous striae, denticulate labium, and scantiness of 

 callus about the si phonal notch, mark this species. 



Ringicula doliaris. T. majuscula, tenuis, ventricosa, ovata, 

 albida; spira acuminata, anfr. 4 rotundatis, sulcis transversis 

 16 



