DE;SCEIPTION OF SPECIES— CUPULIFEE^. 161 



§ III. — Leaves lobate ; borders entire. 



<lu«rciis negHiidoides, Lesqz. 



Plato XXI, Fig. 2. 



Qacrcut negundoides, Lesqx., Annual Report, 1871, p. 292. 



Leaf coriaceous, short-petioled, cordate at the base, enlarging upward to the thiee-fourths of its 

 length, where it is paluiately cut in three short lobes, the middle taper-pointed, the lateral ones shorter 

 and obtuse ; lateral veins seven pairs, equidistant, parallel, craspedodrome. 



This peculiar leaf has no relation to any fossil one known to me. Its 

 appearance is that of some Acer, or of some deformed leaf of Ulmacece. or 

 BetulacctB. I referred it to Quercus on account of its thick consistence and 

 of a distant likeness to Q. fagifolia and Q. trmngularis, Goepp. The leaf is 

 five centimeters long and three and a half broad in its widest part, under the 

 point of the lateral lobes; the petiole is slender, seven millimeters long; the 

 borders entire, slightly irregularly undulate, and the secondary veins all simple, 

 and at an angle of divergence of 40°, except the lower pair, which is basilar, 

 slightly more open, with a few branches on the lower side. 



Habitat. — Evanston, Wyoming, in shale under the main coal (^Dr, 

 F. V.Hayden). 



<tiiercus angrustiloba, Al. Br. 



Plate XXI, Figs. 4, 5. 



Quercus angusHloba, Ludw., Palseont., viii, p. 103, pi. xxxvi, fig. 3. — Heer, Braunk. Pfl. v. Boernst,, p. li, 

 pi. 1, fig. 8. — Lesqx.,- Annual Report, 1872, p. 378. 



Leaves coriaceous, oblong-lanceolate in outline, narrowed to the petiole, deeply cut on each side 

 into two opposite, liucar, obtusely-pointed, narrow, entire lobes, and a terminal one of the same size 

 and form. 



This species is positively identified by the two specimens we have 

 figured here, which, though fragmentary, are more complete than those 

 known from the Oligocene of Europe. The leaves, varying in length between 

 seven and fourteen centimeters, are deeply cut on each side in two oblique 

 linear entire lobes, lanceolate to the point, the lowest four to six centimeters 

 long and about one centimeter broad, with obtuse sinuses. The middle or 

 terminal lobe is broken above its base, but is apparently as long as the lateral 

 ones. The secondary veins are scarcely distinct and the areolation totally 

 obsolete. The consistence of the leaves is evidently thick. 



Habitat. — Golden, Colorado, where I found the specimen represented 

 in fig. 4. The other was discovered at the same locality by Prof. F. B. Meek. 

 11 T F 



