NAPLES FAUNA IN WESTERN NEW YORK, PART 2 405 



20 Enlargement of surface. X3 



Naples subprovince Naples, and vicinity 



Among these shells several show a normal obliquity and to 

 some such valves Hall applied the term Lucina retusa. 

 Figures 2, 3, 11 and 16 are examples of this form. 



Ontaria pontiaca sp. nov. 



Page 287 



21 The original specimen which is a smooth shell with relatively 



long hinge line 



Chautauqua subprovince Pontiac 



Ontaria accincta sp. nov. 



Page 288 



22 Conjoined valves with smooth surface and large prodisso- 



conchs. X3 

 23, 24 Left and right valves. X3 



25 A larger right valve. X3 



Genesee valley Cashaqua creek 



Ontaria concentrica v. Buch (sp.) 



Page 286 



26 A specimen referred to this species, with subcentral beak, 



sharply defined concentric striation and obscure radial plica- 

 tions behind the beak. X2 

 Chautauqua subprovince Correll's point, Lake Erie 



Ontaria sp. ? 



27 A large left valve with oblique umbo and fine concentric 



lineation. Natural size 



Naples subprovince Naples 



Ontaria halli sp. nov. 



[S<» pl. 7] 

 Page 290 



28 A right valve showing the finely radial and corrugated exte- 



rior. X2 



Naples subprovince Naples 



