188 



KEPTILIA 



CLASS III 



on the dentary are three large rectangular pavement teeth ; maxillae with a 

 single series of depressed, conical teeth. Detached teeth are abundant in the 

 Muschelkalk of Southern Germany and France, rare in the Wellendolomite 

 and Alpine Keupeiv 



Cyamodus, v. Meyer. Skull triangular, snout much compressed. Supra- 

 temporal vacuity elongated oval, nearly three times as large as the orbits, 



Placodus gigas, Ag. Muschelkalk ; Bayreuth, 

 Germany. A, Palatal, and B, superior aspects of 

 skull, !/3. C, Oral, and D, lateral aspects of man- 

 dible, l/ 3 . 



Fig. 296. 



Plaeodw hypsiceps, v. Meyer. Muschelkalk ; Bayreuth, Germany. 

 Lateral aspect of skull, i/ 3 . A, Orbit; A r , External narial opening 

 (after von Meyer). 



which are placed in anterior third of the skull. Anterior nares small, 

 separate, nearly terminal. On either side of the palate are placed two or 

 three rounded or elliptical-crushing teeth, the hindmost at least twice the size 

 of the anterior. Muschelkalk ; Bavaria. C. rostratus, Miinster sp. 



