64 ROY L. MOODIE 
atum from the deposits of Linton, Ohio. There are good evidences 
that the species does not belong in the genus Cerater peton and Jackel’s 
genus will undoubtedly stand. There are now known three species 
of this group, two of which are described herewith. 
Fic. 13—The skull of Diceratosaurus laevis X2. 
The species Diceratosaurus laevis is represented by an almost 
perfect skull (Fig. 13) in the American Museum collection. It is 
from the mines at Linton, Ohio and had been identified by Cope 
as Tuditanus radiatus. ‘The specimen consists of the bones of the 
cranial roof, the bones themselves having disappeared. It is not 
probable that the skull bones were smooth. The details in the struc- 
ture of the skull have all been ascertained quite definitely, and there 
can be no doubt that the arrangement of the cranial elements as shown 
=F 
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a ee 
