Bothriolepis nitida Leidy 



(.SV.. plate 3) 



"Shoulder of arm" in articulation with ventrolateral plate. Natural 



size 

 Chemung beds ; Blossburg, Tioga co., Pa. 

 Original in New York State Museum 



Dipterus fleischeri Newb. 



Page 162 



Right upper dental plate. Natural size 

 Oneonta beds ; Franklin, Delaware co., N. Y. 

 Original in New York State Museum 



Ctenacanthus chemungensis Claj-pole 



Page 77 



Superficial ornamentation of spine enlarged, x 3 



Chemung beds ; between P""riendship and Nile, Allegany co., N. Y. 



Original in New York State Museum 



Dinichthys lincolni Claypole 



Paye 129 



Right vomerine tooth, viewed from the front. Natural size 



Marcellus shale ; Geneva, Ontario co., N. Y. 



Holotype in the New York .State Museum 



Inner lateral aspect of same specimen, showing fractures due to 



mechanical deformation. Natural size 

 Ibid. Inferior aspect. Natural size 



Asterolepis clarkei sp. nov. 



Pai;e 40 



Mold of interior surface of posterior dorsal median plate. Natural 



size 

 Chapman sandstone ; Chapman Plantation, Aroostook co., Me. 

 Original in New York State Museum 

 External surface of preceding. Natural size 



