ILLUSTIIATIONS, 



FHIURKS. IN l'\UT I. 



Page. 

 Flo. 1. Sccti.iii ..f till' ciiiivon of lb.' T.iltlc C.ilniailu. Aiizoiiu •'^'^ 



2. SiM'liciM i>f Ihi' MoiMiciipio 'Wash, .\iizoiui 



3. Section of the lower Little C'oloniilo Viilley, Arizona 



4. Section tlirou<;li Winslow, Arizona 



5. Section near Lenaix Wash. Arizona 



JO 



6. Section throuf;h the Petrified Forest of Arizona • - 



7. Section of Rcil Butte 



S. Geolosii-al cohinni of the Older Nh'sozoic of Arizona ^•' 



9. Section of Cow Creek, Nickel Mountain, and Buck Peak, Douglas County, Oreg -17 



10. Potomac exposure on Sixteenth street, Washington, D. C '^' ' 



598 



1 1 . Cohunnar section of tlie Potomac formation 



PLATES, TN P.\RT IT. p,^_,,.. 



Coniferous plants from the Trias of Arizona '"" ' 



Sketch map of the Little Colorado Valley, Arizona, and adjacent regions ''*' 



Sketch map of the Buck Mountain region and Cow Creek Valley, Douglas County, Oreg v 



Jurassic liverworts and ferns from Oregon ^'' 



Jurassic ferns from Oregon 



Jura.ssic ferns and Equiseta from Oregon ^^ 



Jurassic cycads from Oregon 



Jurassic cycads and William.sonias from Oregon ^^'^ 



Jurassic Gingkos from Oregon -^ ' ' ' ' 



Jurassic Gingkoacese and Taxacese from Oregon xxxiv 



Jurassic conifers from Oregon '^^- ^' - • • 



Miscellaneous Jurassic plants from Oregon xxwii 



Jurasso-Cretaceous plants from Oregon and Alaska xxxviii 



Jura-sso-Cretaceous ferns from Cape Lisburne, Alaska xxxix-xi.in 



Jura.sso-Cretaceous cycads and Gingkoaceae from Cape Lisburne, Alaska x"->v 



Jurasso-Cretaceous conifers from Alaska, Montana, and California XLV 



9 



