324 



lente radiatim striata ; foramen integrum, parvum ; cardo ut in 

 Rhynconella ; apophyses ? Diameters about |- inch. Dredged off 

 Japan Coast, 30° 35' N., 130° 40' E., in 110 fathoms, sand, by 

 Capt. Stevens, of the " Hancock." 



Might be taken for a small T. vitrea, but is very thin and 

 delicate, and further distinguished by its destitution of punctures. 



DisciNA STELLA. T. parva, discoidea, plano-convexa, ten- 

 uis, ex apice vix eccentrico levigato demum radiatim striata ; 

 valva inferiori postice 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 ellipsoid ea. 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 milUm. ; 

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



Has the aspect of T. ineriiiis, 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 

 cirrosam producto induta ; umbilico lato, profundo, acute margin- 

 ato ; anfr. 6-|- cito crescentibus, postice 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. ctliata, Ki'uger, which I have not seen. 

 A very curious and elegant species. 



RiNGicuLA denticulata. T. ovata, acuminata, solida, 

 lactea, striis confertis transversis (exilioribus interdum interveni- 



