36 FOSSIL FLORA OF THE SIERRA NEVADA. 
leaflets. No species of Juglans, either fossil or living, is distinetly related 
to this leaf. It has in its shape some likeness to J. Bilinica, Ung., whose 
leaves are very variable in form and size, and sometimes as sharply ser- 
rate as this one; but the characters of nervation are quite different. 
Habitat. — Chalk Bluffs, Nevada County, California. Voy’s Collection. © 
Juglans egregia, sp. nov. 
Pl IX. Fig. J2: Pl ok. oe os 
Leaflets large, firm, but not quite coriaceous, oblong-lanceolate, rapidly narrowed to an 
obtuse point; more gradually attenuated to the petiole ; borders sharply, minutely, 
distantly serrate ; nervation camptodrome. 
Though the leaflets represented upon our plates are different, especially 
in their size, they seem referable to the same species, all the characters, 
except the rounded base of the leaves of Fig. 1, Pl. X., being alike. Dif- 
ferences of the same kind are generally remarked upon species of Juglans 
of the present flora. The leaflets, eighteen to twenty centimeters long, 
four to eight centimeters broad, are either oblanceolate, gradually nar- 
rowed to the petiole, and obtusely pointed, or oblong, rounded to the 
base, and rapidly attenuated or cuneiform to the point; the borders are 
more or less distantly serrate from near the base, and the lateral nerves, 
slightly more open toward the base, are generally equidistant, and on 
the same angle of divergence, averaging 50°. They are, when distant, 
separated by intermediate tertiary veins traversing to the middle of the 
areas, Where, joined by nervilles in right angle, they enter into the areo- 
lation mostly composed of subdivisions of the nervilles, forming irregularly 
square or equilateral large meshes. The veins following the borders in 
simple bows are joined to the teeth by veinlets only, and do not enter 
the borders by their ends. This character refers these fine leaves to 
Juglans rather than to Caria, to which they have some likeness of shape. 
No fossil species is comparable to this one, except, in a very distant 
way, J. Biliuca, Ung., whose leaflets, as remarked above, are very variable 
in shape. 
Habitat. — Chalk Bluffs, California, with numerous fragments of Aralia 
Whitney. Professor J. D. Whitney. 
