APPENDIX 



DESCRIPTION OF FOSSIL LEAVES FROM THE TUNNEL OF THE NORTH FORK 



COMPANY, NEAR FOREST CITY.* 



Quercus transgressus, sp. nov. 



Leaf coriaceous, short-pet loled, 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 ? Heer, Arct. Fi. I. p. 109. Pi. XL Fig. 5; XLVI. Figs. 8, o. 



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

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



parallel, entering the teeth, tvhich in this specimen are scarcely distinct, the borders being 

 mostly destroyed. 



:;: " The specimens here described were collected by Professor Pettee, in 1870, in a tunnel near the Bald 

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

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

 well-preserved for identification are not common; and, in view of the fact that as much light as possible is 

 desired in regard to the nature and range of the Pliocene vegetation, it was considered best that these speci- 

 mens should be referred to Mr. Lesquereux for examination, ami the results published as an appendix to his 

 previous communication on the subject of the fossil plants of the auriferous gravels. —J. \~>. W. 



