389 



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, tortuoso, postico brevi, satis pro- 

 fundo. Axis .3 ; diani. .06+ poll. Inhabits Hong Kong Harbor. 

 W. S. 



Resembles T. corrugatus, Hinds, but the canal and basal sculp- 

 ture are different. 



Triforis calculiferus. T. conico-turrita, albida, sub-cyl- 

 indracea ; anfr. 12 planulatis, seriebus duabus quasi calculorura 

 tertia quoque minore terminali ornatis, interstitiis spiraliter stri- 

 ulatis ; carina in basi baud tuberculata ; suturfi inconspicua : aper- 

 tura (fracta) ? canalibus clausis, antico tortuoso, postico parvo. 

 Axis 6 ; diam. 2 millim. Inhabits Loo Choo. AY. S. 



Triforis clathratus. T. dilatato-subulata, alba ; anfr. 9 

 convexiusculis, carinis spiralibus cinctis, in spira 3 (postica mi- 

 nore), ad peripheriam quarta, circa basin duabus minoribus, a 

 clathris circ. 16 decussatis, juncturis gemmatis ; sutura distincta : 

 apertura (fracta)? canalibus brevibus, apertis. Axis 4; diam. 

 1.5 millim. Inhabits China Seas. W. S. 



Prof. William B. Rogers presented to the Society, in 

 the name of Mr. Norman Easton, of Fall River, a mass 

 of silicious slate containing the imprints of shells, and 

 gave an account of the discovery of these fossils in some 

 of the pebbles of the conglomerate of that region. 



He stated that, some two or three years ago, Mr. Easton had 

 found a fossiliferous pebble on the beach at Fall River, which 

 he at first naturally regarded as a mere fraorment of ballast and 

 of no geological importance ; but, finding afterward other speci- 

 mens of like character, not only on the shore but inland at a high 

 level, he concluded that they must have been derived from some 

 of the rocky masses of the neighborhood, and resolved to trace 

 them to their source. 



