Macropetalichthys rapheidolabis Norwood & Owen 



{See plate 9) 

 Page 103 



I Dorsal aspect of large head shield, denuded of superficial ornamenta- 

 tion, and showing sutures, x ^g (approximately) 

 Delaware limestone (=" Corniferous ") ; Delaware, O. 



Original in Ohio Wesleyan University, Delaware, O. 



216 



