414 GEOLOGICAL SURVEY OF THE TEERITORIES. 



(p. 50, PI. XV, Figs. 12-20.) These leaves are variable in size, from 5 to 

 8 ceutimeters long and proportion all j' broad, oval in outline, taper-pointed, 

 narrowed downward and wedge-form to a long petiole, doubly, irregu- 

 larly, nnequally serrate 5 nervation craspedodrome; secondary veins on 

 an acute angle of divergence, simple, straight ; fibrill^ thin, in right 

 angle to the veins ; areolation composed of very small, uTCgnlarly square 

 and polygonous meshes. The American form agrees by all its charac- 

 ters with the leaves of the Biliu Flora. It differs, however, from Unger's 

 figures (Chloris Prot., PI. xxviii,) by the teeth of the borders more numer- 

 ous and generally more accute, and by the longer petiole. 

 Habitat.— Elko, Prof. Co^e. 



Ficus LANCEOLATA, Heer. 



Leaves thickish, lanceolate, gradually tapering to a thick petiole, 

 peuninerve ; secondary veins open, parallel from the base, campto- 

 drome ; nervilles close, in right angle to the secondary veins ; areola- 

 tion in small polygonal meshes. This species is represented by specimens 

 of two localities. All agree with the characters represented by the author 

 (Flor. Tert. Helv., II, p. 62, PI. Ixxxi, Figs. 2-5,) the leaves being only 

 somewhat smaller. 



Habitat— Floiis'dut, South Park, Cope-, Willow Creek, Middle Park, 

 Holmes; Cut-off", west of Green Elver Btation, with fish remains. 



FiCUS Jynx, Ung. 



Leaves coriaceous, linear-lanceolate, tapering to the petiole, peuni- 

 nerve ; secondary veins open, close, numerous, thickish, straight to the 

 borders, along which they abruptly curve. This leaf is comparable to 

 some forms of F. multinervis, Heer, but still more to the leaf of Bil. Fl. 

 (PI. XX, Fig. 7,) referred by Ettinghausen to F. Jynx, Ung. The petiole is 

 narrower than in F. multinervis. 



Habitat. — Elko, Frof. Cope. 



DiOSPYEOS COPEANA, sp. UOV. 



Leaf of medium size, 7 centimeters long and half as wide, broadly ob- 

 ovate, entire, gradually narrowed downward to a short petiole, rounded up- 

 ward to an obtuse point; nervation penniuerve, camptodrome; lateral 

 veins thin, distinct, the lowest in a slightly more acute angle of diver- 

 gence, curving in passing to the borders, which they lollow in anas- 

 tomosing in double festoons, and separated by shorter tertiary veins. 

 The nervation and the form and fades of the leaf are of a Diospyros ; some 

 of the leaves of our living D. Virginiana have about the sameform, though 

 generally broader, and rounded at the base. 



Habitat. — Elko, Prof. Cope. 



Fraxinus pr^dicta, Heer. 



A small leaf, broad in the middle, gradually narrowed to its base, 

 (petiole broken,) and upward in the same degree in a long obtuse acu- 

 men ; borders slightly and distantly dentate ; nervation camptodrome ; 

 secondary veins curving upon each other in following the borders, with 

 border-branches or veinlets passing up to the points of the very short 

 and small teeth marked only from the middle downward ; borders nearly 

 entire upward. There is only one leaf representing this species ; but it 

 so much resembles those of Fl. Tert. Helvet., (Ill, p. 22, PI. civ. Figs. 13, 

 &c.,) that it is scarcely possible to doubt the identity of these forms. In 

 the specimen described here, the nervation is i^erfectly distinct. 



Habitat. — Middle Park, Pr. Hayden. 



