690 GEOLOGY OF THE YELLOWSTONE NATIONAL PAKK. 



Amono- descril)e(l forms this has some resenililance in shape to 

 J. schimperi Lx.,Mr.nii the Green River group of Cohirado, but differs mark- 

 edly in the forking of the secondaries. It is undoubtedly very close to 

 J. acuminata Heer," which in turn is hardly to be distinguished from the 

 J. riu/osaoi Lesquereux. Additional material of all these will be necessary 

 to settle the status of each. 



Habitat: Northeast side of Crescent Hill; collected by F. H. Knowl- 

 ton and G. E. Culver, August 2, 1888. Fossil Forest, bed ko. C; collected 

 by Ward and Knowlton August, 1887. 



HicoRiA ANTi(,iroRUM (Newliy.) Kn. 



Hicoria antiquorum (Nevrby.) Ku.: I'.ull. U. S. GeoL Sinv. No. 151!, p. 117, 1898. 

 Carija autiquorum Newby.: Later Extinct Floras, p. 72; 111. Cret. aud Tert. Plants, 

 PI. XXllI, flgs. 1-4. Le.sqiiereux : Tert. Fl., p. 289, PI. LYII, figs. 1-5. 



The collection contains a number of somewhat fragmentary specimens, 

 but the characteristic teeth and nervation sufHce to enable their certain 

 reference to this species. 



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

 Ward and Knowlton, August, 1887. 



Hicoria crescentia n. sp. 

 PI. LXXXIY, tig. 7. 



Leaflet thick iind firm, elliptical-lanceolate, in;e([uilatei-al ; i-ather long- 

 wedge-shaped at base aud apparently narrowed above to an acuminate 

 apex; margin serrate, teeth small, sharp; midril) rather thick, straight; 

 secondaries about lo })airs, alternate, irregular, at obtuse angles, ai-ching 

 upwanl, rarelv forked, craspedodrome, or subcraspedodrome, either arching 

 near the margin and sending branches to the teeth, or dividing and sending 

 weaker terminations into the teeth; intermediate secondaries occasional, 

 short, and soon disa,p})earing; nervilles numerous, mainly percurrent, approxi- 

 mately at right angles to the secondaries; liner nervation forming rather 

 large quadrangular areohc. 



The specimen figured is the only one referred to this species, and 

 unfortunatel}" it lacks both base and apex. It is now about 7 cm. long and 



I Tert. Fl., p. 287, PI. LVI, tigs. 5-10. 

 = F1. Tert. Hilv., Vol. Til, PI. CXXVIII. 



