FOSSIL FLORA. 731 



Leguminosites lamarexsis n. sp. 

 PI. LXXXIX, figs. 5, 6. 



Leaflets thin, oblong-lanceolate, rounded-truncate at base, long' acumi- 

 nate at apex; midrib strong, perfectly straight; secondaries about 9 pairs, 

 alternate, at an angle of 45°, slightly curving upward; remainder of nerva- 

 tion not retained. 



This little leaflet is 6 cm. in length and 17 mm. in width. It is very 

 regularly rounded, almost truncate at base, and apparently regularly nar- 

 rowed above into an acuminate apex. The petiole, if there was one, is not 

 preserved. The secondaries are alternate and camptodrome, and about 

 8 or 9 pairs. 



The nearest related species is Leguminosites lesquereuxiana, 1 from the 

 Green River beds of Green River, Wyoming, and also Spring Canyon, 

 Montana. This differs in being larger, broader, and more oblong-ovate 

 than the one under discussion. The relationship is evidently close, and 

 perhaps more material would show closer affinity than I have recognized. 



This species also resembles some of the species of Leguminosites from 

 the Tertiary of Switzerland, as, for example, L. proserpince Heer. 2 There 

 can be no question as to the correctness of the reference to this genus. 



Habitat: East bank of Lamar River, between Cache and Calfee creeks; 

 collected by F. H. Knowlton, August, 1888. 



ANACARDIACEiE. 



Rhus mixta? Lx. 



Rhus mixta Lx. : Mem. Mus. Coinp. ZooL, Vol. VI, No. 2, p. 30, PI. IX, fig. 13. 



A single small and somewhat fragmentary specimen. It resembles the 

 smaller of the two specimens figured by Lesquereux. 



Habitat: East bank of Lamar River, between Cache and Calfee creeks; 

 collected by F. H. Knowlton, August 21, 1888. 



'Tert. PL, p. 300, PL LIX, figs. 1-4. 



»F1. Tert. Helv., Vol. Ill, PL CXXXVIII, figs. 50-55. 



