14 NEW YORK STATE MUSEUM 



Machaeracanthus peracutus Newberry. Columbus and Delaware lime- 

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



Machaeracanthus sulcatus Newberry. Delaware limestone ; Ohio and 

 Canada. Onondaga limestone ; New York. 



Machaeracanthus major Newberry. Columbus and Delaware limestones ; 

 Ohio. 



Acantholepis fragilis Newberry. Columbus and Delaware limestones ; 

 Ohio. Onondaga limestone ; New York. 



Macropetalichthys rapheidolabis Norioood & Owen. 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 Newberry. Delaware limestone ; Ohio. 



Acanthaspis armata Newberry. Delaware limestone ; Ohio. Onondaga 

 limestone ; Le Roy, N. Y. 



Protitanichthys fossatus Eastman. Delaware limestone ; Ohio. 



Coccosteus (Liognathus) spatulatus Newberry. Delaware limestone ; Ohio. 



Coccosteus occidentalis Newberry. " " 



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



Dinichthys precursor (A^(?K'^(:'r;-j'). Columbus limestone ; Ohio. 



Onychodus sigmoides Newberry. Columbus and Delaware limestones ; 

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

 Milwaukee, Wis.; 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 Nezuberry. Moscow shale (Upper Hamilton) ; Yates 



county, N. Y. 

 Machaeracanthus longaevus Eastman. Lower Hamilton ; Eighteen Mile 



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



