FOSSIL FLORA. 711 



Among species of Diyophyllum this species has some resemblance to 

 D. aquamanini "WarfP from Black Buttes, Wyoming. Tlie latter differs in 

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

 more numerous, often camptodrome, secondaries. I), siihfulcatum Lx.,^ 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 

 lG-20, 1887. 



ILMACE.E. 



Ulmus pseudo-fulva ? Lx. 

 PI. LXXXVIII, fig. 2. 

 Ulmu^ pseuilo-fulva Lx. : Mem. Mus. Coinp. Zool., Vol. VI, p. IC, PI. IV, flg. 3, 1878. 



The fragment figured is all that has been found of tliis 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 mhiiniu Ward: Types of the Laramie Fl., p. 4.5, PI. XXII, figs. 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, l»ut the teeth are not well preserved. 



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

 Al. Br. 



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

 F. H. Knowlton, August, 1888. 



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



^Cf. D. bruiieri Ward, uow referred to D. subfalcatum : Types of the Laramie F!., p. 27, PI. X, 

 figs. 5-8. 



