APPEXDIX. 



DESCRIPTION OF FOSSIL LEAVES FROM THE TUNNEL OF THE NORTH FORK 



COMPANY, NEAR FOREST CITY.* 



Quercus transgressus, sp. nov. 



Leaf coriaceous, short-pet ioled, oblong-ovate, tapering to a short acumen, rounded at base to a 

 short petiole; borders entire, recurved ; lateral nerves open, parallel, numerous, 12-14, 

 interlinked by distinct transverse nervilles. 



This leaf, five centimeters long, represents a species closely allied to 

 Quercus chrysolepis, D. C, of California. From the statements of authors, 

 this oak is abundantly distributed from the plains to the mountains. Among 

 my specimens there is, sent by Dr. Kellogg from the Sierra Nevada, a 

 branch bearing coriaceous, entire leaves, with the same characters as the 

 fossil one. Considering merely this specimen, I should be authorized to 

 refer the fossil leaf to this species ; but the normal form has leaves more 

 or less dentate. If this characteristic should be, after further discoveries, 

 recognized upon other fossil leaves of the same formation, the identity of 

 the Pliocene oak with Q. chrysolepis should be clearly established. 



Quercus Steenstrupiana? Hef.r, Arct. Fl. I. p. 109. Pi. xi. Fig. ; XLVI. Figs. 8, 9. 



Lea f small ', four to five centimeters long (the upper part is broken), ovate-lanceolate, rounded 

 in narrowing to the unequal base, obscurely dentate <>n tin- borders : lateral nerves close, 

 parallel, entering the teeth, which in this specimen are scarcely distinct, I In' borders being 

 mostly destroyed. 



* The specimens here described were collected liy Professor Pcttee, in 1879, in a tunnel near the Bald Moun- 

 tain tunnel on the North Fork of Oregon Creek (see Plate Q), about 4,500 feet above the sea-level, and twenty 

 miles north of Chalk Bluffs. Localities in the hydraulic mining region where the leaves are sufficiently well- 

 pre i ved for identification arc not common ; and. in view of the fact that as much light as possible is desired in 

 I to the inline and range of the Pliocene vegetation, it was considered best that these specimens should be 

 red to Mr. Le q a for examination, and the results published i an appendix to his previous communi- 

 cation on ih,' Mil,,,-, t of the fossil plants of the aurifi rous gravels. - ■' • D. W. 



