EXPLANATION OF PLATE 40. 

 Phalarodon fraasi, n. gen. and sp. 

 Prom the Middle Triassic of West Humboldt Bange, Nevada. 



Pig. 1. — Skull and dentition. No. 9853, natural size. 



Pig. 2. — Dentition, with a portion of the mandible. No. 9924, X %. 



