Diplodus striatus Eastm. 



Detached tooth, anterior face. x 4 



Anterior and posterior aspect of large detached cone, x 4 



Upper Devonic ; Ehnhurst, 111. 



Phoebodus politus Newb. 



Page 60 



Detached tooth, anterior face. x 4 

 Cleveland shale ; Lorain county, O. 



Original in Museum of Comparative Zoology, Cambridge, Mass. 

 Sagenodus sp. 



Detached dental plate, of the form usually referred to Sagenodus, 



showing extreme effects of abrasion. Natural size 

 Chemung beds ; Warren, Pa. 



Onychodus hopkinsi Newb. 



(Sec plates 3 and 9) 

 Page 169 



Detached tooth, falcate, but not sigmoidal ; dentine eroded, x 3/2 

 Chemung beds ; Franklin, N. Y. 

 Original in New York State Museum 



Cladodus prototypus sp. nov. 



Page 61 



Detached tooth, posterior face. Coronal cross-section shown at the 



right. Natural size 

 Columbus limestone ; near Columbus, O. 

 Original in American Museum of Natural History, New York. (Cat. 



no. 4257, o/i/n James Hall coll.) 



Homacanthus acinaciformis Eastm. 



Page 75 



Dorsal fin spine, x 3/3 



Chemung beds ; Warren, Pa. 



Original in Museum of Comparative Zoology. Cambridge, Mass. 



