Pi Al LN. 
DINICHTHYS TERRELLI, Newb. 
Fic. 1. Cranium from outside, one-sixth natural size, linear. - 
2. Cranium from inside, one-sixth natural size, linear. 
TITANICHTHYS CLARKI, Newb. (p. 183). 
3. Suborbital plate, one-ninth natural size. 
T1IraNIcHTHys AGAssizit, Newb. (p. 133). 
4. Suborbital plate outside, one-seventh natura! size, linear. 
Cleveland shale, Lorain County, Ohio. 
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