Ww4y*a^»--^_ 



/ 



Frontispiece. — Head of DiNiCHTHYS iNTERMEDius, Newberry, in front 

 and side views. X t^. From photograph of specimen collected by Dr. William 

 Clark, in the Waverly (Lower Carboniferous) of Ohio, now in the collection of 

 Columbia College, New York. (V. p. 133.) 



