14 NEW YORK STATE MUSEUM 



Machaeracanthus peracutus N'czvhcrry. Columbus and Delaware lime- 

 stones ; Ohio. Onondaga limestone ; Le Roy and Lime Rock, N. Y. 



Machaeracanthus sulcatus A'cwbcrry. Delaware limestone ; Ohio and 

 Canada. Onondaga limestone ; New York. 



Machaeracanthus major N^ctobcrry. Columbus and Delaware limestones ; 

 Ohio. 



Acantholepis fragilis N^cwbcrry. Columbus and Delaware limestones ;' 

 Ohio. Onondaga limestone ; New York. 



Macropetalichthys rapheidolabis Norivood & Oivcn. Columbus and 

 Delaware limestones ; Ohio and Indiana, also from rocks of equivalent 

 age in Ontario and James Bay region, Canada. Onondaga limestone ; 

 Le Roy, N. Y. 



Asterosteus stenocephalus Neiuhcrry. Delaware limestone ; Ohio. 



Acanthaspis armata Xcwbcrry. Delaware limestone; Ohio. Onondaga 

 limestone ; Le Roy, N. Y. 



Protitanichth)s fossatus Eastman. Delaware limestone ; Ohio. 



Coccosteus ( Liognathus) spatulatus AV^c^^rrrr. Delaware limestone; Ohio. 



Coccosteus occidentalis Ncivbcrry. " " 



Coccosteus sp. Onondaga limestone ; Clifton Springs, N. Y. 



Dinichthys precursor {N'ciobcrry). Columbus limestone; Ohio. 



Onychodus sigmoides Newberry. Columbus and Delaware limestones ; 

 Ohio. Onondaga limestone; New York, and (?) Hamilton limestone; 

 Mihvaukee, W'is.; Cedar Valley limestone ; Iowa. 



Erian stage (Marcellus and Hamilton) ; New York 



Class PISCES 



Dermal denticles, possibly of Cladoselache. Marcellus shale ; Le Roy, 



N. Y. 

 Ctenacanthus wrighti A'eivberry. Moscow shale (Upper Hamilton) ; Yates 



county, N. Y. 

 Machaeracanthus longaevus Eastman. Lower Hamilton ; Eighteen Mile 



creek, N. Y., and (?) Milwaukee, Wis. 



