FOSSIL FLOUA. 723 



the leaf figured by Professor Ward as this species from Carbon, Wyoming. 

 More material will be necessary before its status can be fixed with certainty. 

 Habitat : Yellowstone River, half a mile below mouth of Elk Creek, 

 foot of bluff; collected by F. H. Knowlton, August, 1888. 



Laurus perdita n. sp. 

 PI. XCIV, figs. 1-5. 



Leaves coriaceous, broadly lanceolate, wedge-shaped at base, obtusely 

 acuminate at apex; margins entire, but very slightly undulate; petiole 

 short, stout; midrib thick, straight; secondaries 7 or 8 pairs, alternate, 

 camptodrome, arising at an angle of 40° or 45° and curving upward and 

 arching along near the margin and forming numerous broad loops or 

 bows; nervilles numerous, irregular, mainly forked, approximately at right 

 angles to the midrib; finer nervation not preserved. 



The collection contains a number of specimens of this species, none of 

 them, however, quite perfect. They are about 15 cm. long and about 

 4.5 cm. broad. The 5 specimens figured show well the character of the 

 species. They are broadly lanceolate, with a regularly narrowed base and 

 apparently a rather obtuse apex. The secondaries are about 7 pairs, which 

 arch much upward and along the borders. The nervilles are numerous, 

 mainly at right angles to the midrib, and irregular and often broken. 



This species has some resemblance to Laurus granclis Lx., 1 from the 

 Auriferous gravels of California, differing in being smaller, narrower, and 

 not so obtuse at apex. The resemblance is close enough, however, to make 

 it reasonably certain that the 2 species are quite closely related. 



Persea pseuclo-carolinensis Lx., 2 from Table Mountain, California, is some- 

 what similar, but differs in being broader, more obtuse, and in having finer 

 nervation. 



Habitat: Hill above Yancevs and near the standing fossil trees; col- 

 lected by F. H. Knowlton, August 28, 1888. Near same locality; collected 

 by George M. Wright, September 24, 1885. 



i Cret. and Tert. PI., p. 251, PI. LVIII, Bgs. 1, 3. 



2 Mem. Mus. Comp. Zool., Vol. VI, No. 1, p. 19, PI. VII. figs. 1, 2. 



