FOSSIL FLOEA. 687 



the true Green River group. This locality has not since been visited, and 

 in fact can not now be satisfactorily located. It is more than probable, 

 however, that the former determination of horizon is correct. 



So far as I now know, this is the second time this species has ever been 

 found. It is represented by 5 or 6 fairly well preserved specimens, which 

 agree perfectly with Lesquereux's specimens and figures. 



On one of the specimens there are a number of thick stems or stipes. 

 They are longitudinally striate as described by Lesquereux, and bear only 

 fragments of the leaves preserved. In the specimen figured we have a 

 narrow leaf preserved almost entirely. It is about 5 cm. broad and 7 cm. 

 long, as preserved, with perfectly entire margins. In still another specimen 

 the stipe, with portions of the lamina attached, is fully 20 cm. long. There 

 is no evidence from these specimens of the leaves having been as broad as 

 described in some of the original specimens, but Lesquereux also speaks of 

 narrow-leaved forms. 



Habitat: Northeast side of Crescent Hill, opposite small pond, Yellow- 

 stone National Park; collected by F. H. Knowlton, August 2, 1888. 



JUGLANDACEiE. 



JUGLANS CALIFORNIEA Lx. 



Juglans californica Lx. : Foss. Fl. Aurif. Grav. Deposits, Mem. Mus. Comp. Zool., Vol. 

 VI, No. 2, 1878, p. 35, PI. IX, fig. 14 ; PI. X, figs. 2, 3. 



There are 2 specimens which I refer to this species. They are of 

 the same size and nervation as the leaf shown in fig. 2, PI. X, of Lesquereux's 

 paper. 



Habitat: Fossil Forest Ridge, bed No. 6, "Platanus bed; 1 ' collected by 

 Ward and Knowlton, August 1 9, 1887. East bank of Lamar River, between 

 Cache and Calfee creeks; collected by F. H. Knowlton and Gr. E. Culver, 

 August 21, 1888. 



Juglans rugosa Lx. 



Juglans rugosa Lx.: Of. Tert. Fl., p. 2S6, PL LV, figs. 1-9. 



The collections contain a number of very perfectly preserved specimens 

 that undoubtedly belong to this species. Besides these there are a number 

 of fragments that probably belong to it. 



Habitat: Fossil Forest Ridge, beds Nos. 3, 5, 6, 7; The Thunderer; 



