20 PROCEEDINGS OF TORONTO MEETIB 



' ' shell impunctate.) 



<>. Billingsi, Hartl J." ( ibrian. 



P Potsdam. 

 0. plicifera, •• Cha 



(>. borealis, Bill. . Trenton. 



pad .. " & Hudson Rivei — Cincinnati group. 







nuata, Ball " 



11 lis, Hall.... 



O. | ,Mcl 



0. rel Salter 



8 A. Miller 



<•. insculpta, Hall '• 



O. Dayt ('lint. in. 



<». fausta, " 



tystrophia group. (Shell impunctate.) 



V. biforata Chazy — Clinton. 



1'. var. lynx, Eichwald Hudson River — Cincinnati group. 



1' " " acutilirata, Conrad " 



1". • " laticostata, James " " 



P. " " crassa, •• " " 



O. plicatella group. (Shell impunctat( 



O. tritonia, Bill Cha 



\ i. Winchell .__. .Treuton. 



o. pectinella, Conrad 



O. plicatella, Hall " & Hudson River — Cincinnati group. 



o. Bi 



O. triplicatella, Meek 



[uivalvis, Hall " 



<> Jamesi 



ibquadi I 



O. Kan Mc< !hesn< j 



Whitfieldi, Winchell 

 1 1 Niagara. 



■ ' Shell impum 



Mall ._ Chazy. 



< i • '.'■ Coi Trenton — Hudson Ri\ ■ 



0. di 



(». Ball), Safford 

 0. merope, Bill. 



1 ' I > ■ '• ■ rn. .__. \ a 



