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



EXPLANATION OF PLATE XLVIL 



Upper Trias, Zone of Tropites siibbtdlahis, Karnic stage, Bro(^k Mountain, 



on divide between Squaw Creek and Pitt River, six miles 



northeast of Winthrop, Shasta County, Cahfornia. 



Page 



Fig. I . Paratropites dittmari Mojsisovics 396 



Fig. 2. Proclydonautiliis triadicus Mojsisovics 401 



Fig. 3. Tropites dilleri Smith, sp. nov 393 



Fig. 4. Tropites torquillus Mojsisovics 394 



Figs. 5-6. Sagenites ( Tr achy sag enites) herbichi Mojsisovics 399 



