428 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XLVIIL 



Upper Trias, Zone of Tropites subbidlatus, Karnic stage, Brock Mountain, 



between Squaw Creek and Pitt River, six miles northeast 



of Winthrop, Shasta County, California. 



Page 



Figs. 1-2. Halobia super ba Mojsisovics 403 



Figs. 3-4. Trachyceras (Protrachyceras) shastense Smith, sp. nov. 391 

 Figs. 5-6. Eutomoceras sandlingense Hauer 397 



