414 NEW YORK STATE MUSEUM 



Praecardium multicostatum sp. nov. 



Page 308 



21 A right valve showing the flat and slightly concave ribs. X3 



22 A left valve. X2 



23 Another left valve with similar features as figure 21 



24 A left valve. X2 



Chautauqua subprovince Forestville 



Praecardium duplicatum Minister (sp.) 



Page 



25 A left valve bearing broad ribs, flattened and quite concave 



on top, and with sharply elevated edges ; the intervening- 

 grooves have nearly the same width as the double ribs. X2 

 Chautauqua subprovince Johnson's falls, near Strykersville 



Genus puella Barrande 



Page 309 



Puella sp.? 



26 A small shell possibly representing this genus ; the only one 



as yet found within the Portage formation 



Naples subprovince Cook's ravine, Canandaigua lake 



Puella sp. 

 27, 28 Two valves showing the character of the exterior, xi.5 



Genesee shale Seneca point, Canandaigua lake 



Puella sp.? 

 29 A right valve of uncertain relations 



Genesee shale Iron Bridge Mills, Cayuga creek 



