FOSSIL FLOKA. 705 



destroyed, but probably toothed or lobed; midrib thick, straight; seconda- 

 ries about 18 pairs, alternate, at various angles, curving upward, apparently 

 camptodrome ; finer nervation entirely effaced. 



The figured specimen is 19 cm. in length, and was probably at least 22 

 cm. in length when entire. It is about 7 cm. broad in the widest part, which 

 is above the middle of the leaf. Unfortunately the margin, with the excep- 

 tion of a small portion near the base, is destroyed, and consequently it is 

 impossible to properly characterize this leaf. There is, however, a little 

 evidence to show that the margin was not entire for the whole distance, but 

 this is too vague to be of much value. 



I have referred this leaf provisionally to the genus Quercus, from its 

 resemblance to certain living forms, but it will be necessary to see additional 

 material before the correctness of this view can be tested. 



Habitat: Yellowstone River, one-half mile below mouth of Elk Creek, 

 at top of bluff; collected by F. H. Knowlton, August, 1888. 



Quercus furcinervis americana Kn. 

 PI. LXXXVIII, fig. 5. 



Quercus furoinervis americana Kn. : Bull. U. S. Geol. Surv. No. 152, p. 192, 1S98. 

 Quercus furcinervis Rossni. Lesqueieux: Crefc. aud Tert. FL, p. 244, PI. L1V, figs. 1, 2. 



The specimen here figured is certainly the same as that figured by 

 Lesquereux (loc. cit., PI. L1V, fig. 1) for this species. 



Habitat: Fossil Forest Ridge, bed No. 5; collected by Ward and 

 Knowlton, August 19, 1887. 



*&■ 



Quercus weedii n. sp. 



PI. LXXXVII, fig. 4. 



Leaves membranaceous, ovate, rounded at base, acuminate at apex, 

 margin strongly, irregularly toothed, teeth minutely spiny-pointed; nerva- 

 tion pinnate; midrib straight; secondaries about 8 pairs, alternate, at 

 an angle of about 45°, flexuose, craspedodrome, entering the teetli or 

 forking near the margin and the branches passing into the teeth, or with 

 strong nervilles crossing between 2 secondaries and sending a branch to 

 the intermediate teeth; nervilles numerous, strong, at various angles, 



MON XXXII, l'T II 45 



