422 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Skr. 



EXPLANATION OF PLATE XLV. 



Middle Trias, Daonella beds, on divide between Troy Canyon and the south 

 fork of American Canyon, West Humboldt Range, Nevada. 



Pagb 



Figs. 1-2. Trachyceras (Anolcites) hyatti Smith, sp. nov 389 



Figs. 3-4. Trachyceras (Anolcites) meeki Mojsisovics 390 



Fig. 5. Beyrichites rotelliformis Meek 379 



