46 MESOZOIC FLORAS OF UNITED STATES. 



the drainage and all the principal localities are shown and the lines of the 



sections indicated as follows: 



A-B, Section I: Canyon of the Little Colorado. 



C-D, Section II: The Moencopie Wash. 



E-F, Section III: The lower Little Colorado Valley. 



G-H, Section IV: Winslow. 



I-K, Section V : The Leroux Wash. 



L-M, Section VI: The Petriiied Forest . 



N-0, Section VII: Red Butte. 



P-Q, Approximate line of strike. 



