FOSSIL floi;a. 723 



the leaf figured by Profcssui- Ward as this species fnnn Carlion, Wvoiniiia-. 

 More material will l)e necessary before its status can l)e fixed with (•ertaint\-. 

 Habitat: Yellowstone River, half a mile l)elow uiduth of Elk Creek, 

 foot of bluff: collected by F. H. Knowlton. Auu'ust, ISSN. 



Laurus PERDrrA n. sp. 

 PL XCIV. tigs. 1-5. 



Leaves coriaceous, broadly lanceolate, wedL;-e-shaj)ed at l)ase, obtuseh* 

 actiminate at apex; maroins entire, but very sliiihtly undulate; petiole 

 short, stout; midril) thick, straiohi; secondaries 7 or 8 pairs, alternate, 

 camptodrome, arisini;- at an angle of 40- or 45' and curving u[)ward and 

 arching along near the niargin and firming numerous broad loops or 

 bows; nervilles numerous, irregidar, 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, (j^uite perfect. They are about 15 cm. long and about 

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

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

 a]5parently a rather obtuse apex. The secondaries are about 7 pairs, which 

 arch much ujiward 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 Ldiirtis (lycnidts Lx.,^ from the 

 Auriferous gravels of California, difi:ering 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. 



Pcrsea psoKh-cayolmensis Lx.,-from Table Mountain, California, is some- 

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

 nervation. 



Habitat: Hill aliove Yanceys 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. 



>Cret. and Tert. Fl., p. 251. PL LVIIl, figs. 1, 3. 



-Mem: Mus. Comp. Zo;il., Vol. VI, No. 1. p. 19, PL VIL figs. 1, 2. 



