280 MESOZOIC FLORAS OF UNITED STATES. 



the Potomac Formation. It will be observed that while individuals of some species 

 are abundant in the collection, they are in a condition so imperfect that some doubts 

 must rest on their identification, and further investigation may throw mucli light 

 on their age and affinities. There can, however, be scarcely any doubt as to their 

 general reference to the Neocomian group of the Lower Cretaceous, and to the 

 lower part of the earlier or Lower Cretaceous as held by the Canadian Geological 

 Survey, and as recently fully illustrated for the United States in the Bulletin of the 

 United States Geological Survey. 



The following list embraces all the Kootanie plants that had been 

 reported prior to the year 1895, when I visited the Great Falls coal basin 

 and made my collection : 



Angiopteridium canmorense Dn Canada. 



Anomozamites acutiloba Heer ? Canada. 



Anomozamites sp. Dn Canada. 



Anthohthes horridus Dn Canada. 



Asplenium Dicksonianum Heer Canada. 



Asplenium distans Heer Canada. 



Asplenium martinianum Dn Canada. 



Baiera brevifolia Newb Great Falls. 



Baiera longifolia (Pom.) Heer Canada. 



Baieropsis sp. Dn Canada. 



Carpolithus virginensis Font Great Falls. 



Carpolithus sp. Dn Canada. 



Cephalotaxopsis sp. Dn Canada. 



Chiropteris spatulata Newb Great Falls. 



Chiropteris Williamsii Newb Great Falls. 



Cladophlebis angustifolia Newb Great Falls. 



Cladophlebis Browniana (Dunk) Sew Canada and Great Falls. 



Cladophlebis constricta Font. ? Great Falls. 



Cladophlebis distans Font. « Great Falls. 



Cladophlebis falcata Font Canada. 



Cladophlebis heterophylla Font Great Falls. 



Cladophlebis parva Font Great Falls. 



Cladophlebis sp. Dn Canada. 



Cycadeospermum rotundatum Font. ? Great Falls. 



Cyperites sp. Dn Canada. 



Dicksonia sp. Dn - Canada. 



Dioonites borealis Dn Canada. 



Dryopteris angustipinnata montanensis (Font.) Kn Great Falls. 



Dryopteris fredericksburgensis (Font.) Kn Great Falls. 



Dryopteris monocarpa (Font.) Kn Great Falls. 



Dryopteris montanensis (Font.) Kn Great Falls. 



