424 NEW YORK STATE MUSEUM 



PLATE 15 



Genus palaeoneilo Hall 



Page 311 



Palaeoneilo petila sp. nov.. 



Page 311 



i Sculpture cast of a right valve. X2 

 2 Sculpture cast of a left valve. X2 



Naples subprovince Naples 



3, 4, 5 Three views of a specimen with the valves in normal apposi- 

 tion ; a barite replacement. X3 



6 The exterior of a right valve ; a replacement. X3 



7 The same from within showing the straight and numerous 



denticulations, the relatively broad cardinal platform and 



the position of the muscle scars. X5 



Naples subprovince Honeoye lake 



8 An internal cast showing the cardinal denticulations. X5 



Chautauqua subprovince Pontiac N.Y. 



Palaeoneilo constricta Conrad (sp.) 



Page 311 



9 A right valve. X2 



10, 1 1 Left and right valves. X2 



Chautauqua subprovince Correll's point, Lake Erie 



12 Cast of cardinal area of left valve, showing the curvature of 



the denticulations and sockets, xio 



13 A left valve. x2 



Chautauqua subprovince Forestville 



Palaeoneilo muricata sp. nov. 



Page 312 



14 Exterior of a barite replacement of the left valve showing the 



three umbonal ridges and furrows, strong and posteriorly 

 lamellose growth ridges, xy 



