FOSSIL FLOEA. 689 



The nervation is somewhat similar, except that the secondaries are more 

 numerous. 



The relation between J. laurifolia and J. denticiUata Heer, from the 

 Green River 1 group, Carbon, Wyoming, etc., while apparent, is much more 

 remote than in the case of the California species. This species has very 

 unequal-sided leaves, with large and more numerous teeth and more 

 numerous arched secondaries. 



Habitat: Hill above Yanceys and near the upright fossil trees; col- 

 lected by F. H. Knowlton, August 28, 1888. Also found on southern spur 

 of Chaos Mountain, altitude 10,100 feet; collected by F. P. Kino- for 

 Arnold Hague, August 11, 1897. 



JUGLANS CRESOENTIA 11. Sp. 



PL LXXXIV, fig. S. 



Leaflets large, of firm texture, lanceolate, narrowing to a long acumi- 

 nate apex, truncate and slightly unequal-sided at base; margin perfectly 

 entire, slightly undulate; midrib thin, straight; secondaries 15 or 18 

 pairs, alternate, at an angle of 35° to 45°, camptodrome, forking below 

 the margin and joined to the one next above, forming a series of strong 

 bows; intermediate secondaries frequent, about midway between two sec- 

 ondaries, thin and soon vanishing or rarely passing to the loop made by the 

 secondaries; a series of small loops are produced by outside branches from 

 the large bows which nearly or quite reach the margin; finer nervation 

 dividing the space between the secondaries and intermediate secondaries by 

 large quadrangular areolation. 



This fine species is represented by a number of beautifully preserved 

 specimens. The best is the one figured, which is 20 cm. in length and 

 nearly 4.5 cm. in width. As stated in the diagnosis, it is truncate and 

 slightly unequal-sided at the base and long acuminate at the apex. The 

 margin is slightly undulate, but not otherwise cut or serrated. The second- 

 aries are numerous, about 16 or 17 pairs, and strictly alternate. They 

 fork at half or two-thirds of their length from the' midrib and, uniting 

 with the one next above, form a series of broad, strong loops well inside the 

 margin. The finer nervation is A^ery perfectly preserved, forming large 

 but quite regularly quadrangular areola?. 



1 Tert. Fl.. p. 289, PI. LVIII. Gjr. I . 

 3ION XXXII, FT II 44 



