THE 



BASHFORD DEAN MEMORIAL VOLUME 



ARCHAIC FISHES 



Edited By 

 EUGENE WILLIS GUDGER 



Article IV 



THE STRUCTURE OF DINICHTHYS 

 A CONTRIBUTION TO OUR KNOWLEDGE OF 



THE ARTHRODIRA 



By ANATOL HEINTZ 



Curator of the Paleontological Museum 

 Oslo, Norway 



THE 



/AMERICAN \^ 

 MUSEUM 



NATURAL 

 HISTORY 



. EDUCMION 



NEW YORK 



PUBLISHED BY ORDER OF THE TRUSTEES 



Issued June 15, 1932 



