PLATE XXXIX. 



PAGE 



Supposed clavicular plate of Dinichthys or of Titanichthys, portion of the shoulder girdle. 

 Opposite, (outer) aspect of that represented on Plate XXXVIII. The smaller 

 figure represents a corresponding plate or bone of a somewhat smaller species 

 from the Huron Shale of Delaware, O, found by the Rev. H. Hertzer . 609 



