6 CONTEXTS. 



Part II. — The Jirassic flora — Continued. Pnge. 



Jurassic <'yca<ls from Wyoming 179 



Internal .stnicture of Cycadella 19S 



On till' foliage of tlip .lurassic cycads of the genus CycacleUa, by G. R. Wieland 19S 



Jura.s.sic cycads from the Black Hills 203 



Field notes, by C. K. Wieland 20.5 



Note on Fremont's collection 207 



Part III. Thk Cretaceocs flora 209 



Lower Cretaceous flora of Queen Cluulotte Islands 209 



Flora of tlie Shasta formation 211 



Xotes on some fossil plants from the Shasta group of California and Oregon, by William M. 



Fontaine 221 



Cycadean tnuiks from the Shasta formation 273 



Flora of the Kootanie formation 277 



Notes on some Lower Cretaceous (Kootanie) plants from Montana, by William M. Fontaine. 2S4 



Flora of the Lakota formation of the Black Hills 315 



Notes on the .stratigraphj' and paleontolog\' of the Black Hills rim, by G. K. Wieland 317 



Flora of the Trinity formation 326 



Flora of the Older Potomac formation 342 



Historical review 342 



The Marjdand cycads 404 



vStratigraphical position and general nature of the Maryland cycads, by Arthur Bibbins . 411 



Description of the species 416 



Recent collections of fossil plants from the Older Potomac of Virginia and Maryland 474 



Report on various collections of fossil plants from the Older Potomac of Virginia and Mary- 

 land, by William M. Fontaine . . 476 



Introduction 476 



• Localities in Virginia 478 



Fossil plants from t he James River 479 



Fossil plants from .\lum Rock 4S0 



Fossil plants from the seventy-second railepost 480 



Fossil plants from near the seventy-.second milepost 481 



Fossil |)lants from the l)ank near Brooke 482 



Fossil plants from Cockjjit Point 482 



Fossil [)lants from near Woodbridge 485 



Fossil plants from near Lorloii station -w 4S.5 



Fossil plants from the Colchester road 487 



Fossil plants from White House Blulf and Mount Vernon (Brooke beds) 487 



Fossil plants from MouiU Vernon 490 



Fo.ssil plants from Hell Hole 504 



Fo.ssil plants from mouth of Hell Hole 508 



Fossil plants from Chinkapin 1 lollow 509 



Localities in the District of Columbia 516 



Fossil plants from Sixteenth street 516 



