PLATE CXXXI 



Palate of Menodus trigonoceras 



Plate prepared under the direction of Professor Cope. One-half natural size. (See p. 529) 



Am. Mus. 6356, Horsetail Creek, northeastern Colorado, Chadron formation. Upper teeth of cotype skull. The teeth are more 

 accurately figured in Plate CXXXII, B, but this lithograph shows well enough the anteroposteriorlj' elongate molars and the 

 progressive premolar cusps of Menodus. The external cingula should have been more clearly defined. The incisor alveoli 

 are represented too large, as the specimen shows that the roots of the incisors were small, as in Menodus. 



