PLATE II. 



TEETH OF TRIASSIC SAURIANS, NATURAL SIZE. 



Figure 1. Palceoctonus orthodon^ Cope. Crown of anterior tooth, interior side ; 



o and b, edge views; c, section at inferior extremity of long cutting edge. 

 Figure 2. Palceoctonus appalachianus , Cope. Anterior tooth; lettering as in 



figure 1. 

 Figure 3. Palceoctonus appalachianus , Cope. Posterior tooth, external side ; a, 



internal side. 

 Figures 4-6. Palceoctonus dumblianus, Cope. Anterior and posterior teeth; 



lettering as in figures 1-3. 



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