Diplodus striatus Eastm. 



Page 60 



10 Detached tooth, anterior face. x 4 



1 1 Anterior and posterior aspect of large detached cone, x 4 

 Upper Devonic ; Elmhurst, 111. 



Phoebodus poHtus Newb. 



Page 60 



12 Detached tooth, anterior face, x 4 

 Cleveland shale ; Lorain county, O. 



Original in Museum of Comparative Zoology, Cambridge, Mass. 



Sagenodus sp. 



Page 160 



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



showing extreme effects of abrasion. Natural size 

 Chemung beds ; Warren, Pa. 



Onychodus hopkinsi Newb. 



(See plates 3 and 9) 

 Page 169 



14 Detached tooth, falcate, but not sigmoidal ; dentine eroded. x3/^ 

 Chemung beds ; Franklin, N. Y. 



Original in New York State Museum 



Cladodus prototypus sp. nov. 



Page 61 



15 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, oliin James Hall coll.) 



Homacanthus acinaciformis Eastm. 



Page 75 



16 Dorsal fin spine, x 3/2 

 Chemung beds ; Warren, Pa. 



Original in Museum of Comparative Zoology, Cambridge, Mass. 



197 



