EXPLANATION OF PLATE 6. 



Pogonodon davisi, n. sp. 

 Upper John Day, five miles southeast of Monument; Grant County, Oregon. 

 Fig. 1. Side view of skull No. 789. X Page 54. 

 Fig. 2. Inferior aspect of palatal region. No. 789 shown in fig. 1. X 

 Fig. 3. Superior aspect of cranium shown in fig. 1. X %. 



