FOSSIL FLOEA. 711 



Among- species of Dryophyllum this species has some resemblance to 

 D. aquamarum Ward 1 from Black Buttes, Wyoming. The latter differs in 

 being broadest below the middle, undulate or sinuate toothed, and in having 

 more numerous, often camptodrome, secondaries. D. subfalcatum Lx., 2 from 

 Point of Rocks and Hodges Pass, Wyoming, also has some resemblance, 

 but is much smaller, with more numerous close secondaries. 



Habitat : Fossil Forest Ridge, Yellowstone National Park, bed No. 7, 

 " Castanea bed ;" collected by Lester F. Ward and F. H. Knowlton, August 

 16-20, 1887. 



ULMACE.E. 



Ulmus pseudo-fulvaJ Lx. 

 PI. LXXXVIII, fig. 2. 

 Ulmus pseudo-fuiva Lx. : Mem. Mus. Comp. Zool., Vol. VI, p. 16, PI. IV, fig. 3, 187S. 



The fragment figured is all that has been found of this form, and it is 

 doubtfully referred to this species. 



Habitat: Lamar River, between Cache and Calfee creeks, Yellowstone 

 National Park; collected by F. H. Knowlton, August, 1888. 



Ulmus minima? Ward. 



Ulmus minima Ward: Types of the Laramie Fl., p. 45, PI. XXII, tigs. 3, 4. 



A single small broken specimen is referred doubtfully to this species. 

 It is of about the same size, but has the secondaries at a little lower angle, 

 and has the nervilles well preserved. They are strong and percurrent. 

 The margin is toothed, but the teeth are not well preserved. 



This leaf is found on the same piece of matrix with Ficus tilicefolia^ 

 Al. Br. 



Habitat: Mountain back of Yancey s, near the fossil trees; collected by 

 F. H. Knowlton, August, 1888. 



1 Types of the Laramie Fl., p. 26, PI. X, figs. 2-4. 



2 Cf. D. iruneri Ward, uow referred to D. subfalcatum : Types of the Laramie Fl., p. 27, PI. X, 

 figs. 5-8. 



