Onychodus hopkinsi Newb. 



usee plates i and 3) 

 Page .69 



Detached presymphysial tooth. Natural size 



Chemung beds ; FrankHn, Delaware cc, N. Y, 



Original in New York State Museum 



(It will be noted that, as respects size and curvature, teeth of this 

 species are indistinguishable from the earlier O. sigmoides; the 

 average size of the Chemung teeth, however, is inferior to either the 

 example here figured or the original of plate i, figure 14. For a 

 complete series of presymphysial teeth in natural association, see 



pi- 3, fig- :v) 



Detached presymphysial tooth from same horizon and locality as the 



last. Natural size 

 Original in New York State Museum 



Coccosteus occidentalis Newb. 



Dorsomedian plate of type specimen, refigured to show presence of 



sensory canals and extent of long posterior process. Natural size 

 " Corniferous limestone," Ohio 



Original in American Museum of Natural History, New York 

 Rhadinichthys sp. nov. 



4 Trunk of imperfect Palaeoniscid fish, probably representing a new 



species of Rhadinichthys, x 4/3 

 Photograph of the trunk of holotype shown in plate 4, figures 10 and 1 1 

 Chemung beds, Warren, Pa. 



Macropetalichthys rapheidolabis Norwood & Owen 



iS,e plate ii) 

 Page .03 



5 Disarticulated plates of head shield belonging to a single individual. 



Natural size 

 Columbus limestone (^ " Corniferous ") ; Columbus, O. 

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



no. 269 G) 



