Tin GEOLOGY OF THE YELLOWSTOIv^B NATIONAL PARK. 



tiou preserved is 8 cm. long- and nearly 8 cm. wide. There is, of course, 

 no means of knowing the configuration of base and apex, liut from all 

 indications it is proliuble that the base Avas rounded-truncate and the apex 

 abruptly acuminate. Tt is well characterized by secondaries, of which the 

 lower prominent pair are strongest and arch up and join b}^ a broad loop 

 to tlie secondaries above, producing a palmately ribbed leaf. 



I am uncertain as to the correctness of this g'eneric reference, but it 

 seems to api)roa,ch closer to P^icus than any other. In any case, it is so 

 Avell marked that it can be i-eadily recognized. It does not appear closely 

 related to any fossil .species with which I am familiar, but among living 

 .species it has considerable resemblance to F. nodosa Tey. and Binn., and 

 F. proccra R., both from British India. 



The species is named in honor of the discoverer. 



Habitat: Fossil Forest Ridge, middle stratum; collected b}^ Arnold 

 Hague, September 21, 1.S84. 



FiCUS TILLEFOLIA? Al. Br. 



A fragment of the liasal portion ol a large leaf, apparently of this 

 species. It is, for example, very much like the figure given by Lesquereux,^ 

 from the Auriferous gravels of California. 



Habitat: Hill above Yancey s and near the fossil trees; collected by 

 F. H. Knowlton, August, 1888. 



FiCUS ASIMIN^FOLIA Lx. 



Fivus asimince folia Lx. : Oret. aud Tert. Fl., p. 2.50, PI. LVf, tijis. 1-3. 



A single deformed leaf, which agrees in nerv;itiou with this species and 

 with the upper portion of another perfect leaf. 



Habitat: Fossil Forest Ridge, bed No. 3, "Magnolia bed;" collected 

 by Ward and Knowlton, August, 1887. Yellowstone River, one-half mile 

 below mouth of Elk Creek, base of blufi"; collected by F. H. Knowlton, 

 August, 1888. 



ArTOCAKPUS ? QUERCOIDES U. sp. 



PI. XCII, fig. 1. 



Leaf large, thick, 5 (7"?)-lobed, lower lobes large, rounded; upper 

 lateral lobes smaller, turning upward, of about the same size at apex as 



' Mem. Mu8. Comp. Zoiil., Vol., VI. No. 2. p. 18, PI. IV, fig. 8, 1878. 



