I02 THE AMEKICAX NATURALIST. [Vol. XXXVIII. 



dontia. The teeth are differentiated as in mammals into 

 incisors, canines (sometimes double), and molars ; the molars, 

 however, are simple, and the palate is simple, like that of the 

 Cotylosauria, that is, there is no secondary palate. 



2. Suborder Cynodontia Owen. 



This was originally defined as the "family" Cynodontia by 

 Owen in 1861, and may be embraced within the order " Therio- 



dontia" Owen of 1876, which was based on the same types, 

 viz. : Galesaurus and Cynochampsa. 



These are intermediate anomodonts of medium size. In 

 contrast with the Therocephalia the squamosal is more expanded 

 and the quadrate is greatly reduced. Approaching the mammals 

 also, there is the secondary palate, formed of the maxillaries and 

 palatmes, also the double condition of the occipital condyles 



