718 GEOLOGY OF THE YELLOWSTONE NATIONAL PAKE, 



shape and tliick midril) of the other, but differs essentially in having 3 

 or 4 secondaries instead of 1 in each lobe. It is, however, a leaf suf- 

 ficiently well characterized to j^ermit it to be readilj' recognized, and if 

 material is hereafter found that will throw additional light on its affinities, 

 it can be easily transferred to its proper genus. For the present it may 

 remain under Artocarj)iis. 



Habitat: Yellowstone River, one-half mile below moutli e>f Elk Creek; 

 collected by F. H. Knowlton, August, 1888. 



MAGNOLIACEiE. 



Maoxolia califoknica ? Lx. 



Magnolia californica Lx. : Foss. PL Aurif. Gravels, Mem. Mus. Comp. ZoiJl., Vol. VI, 

 No. 2, 1878, p. 25, PI, VI, tigs. .5-7. 



A single specimen, of which oidy the upper part is preserved. It has, 

 so far as can lie mnde out, the shape and nervation of this species, but it is 

 so much lirokeu that its ])ositive identification is not possible. 



Habitat: Fossil Forest Kidg6; Hague's No. lUGO. 



Magnolia spectabilis n. sp. 

 PI. XGIII, flys. 1, 2. 



Leaves very thick, ct)riaceous; liroadly elliptical-lanceolate in outline, 

 with regularly rounded base and rather abrupt obtusely acuminate apex; 

 margin perfectly entire, not undidate; midrib thick, straight; secondaries 

 about 18 or 20 pairs, alternate, regular and jjarallel or slightly irregular 

 on emergence from the midrib, becoming ^jarallel above; secondaries either 

 forking near the margin or arching along and joining the one next aljove 

 in a series of loops, with a series of smaller loops outside; intermediate 

 secondaries usually numerous, sometimes passing nearly to the junction of 

 the primary ones, or becoming lost at one-half or two-thirds of the distance 

 from midrib to margin, irregular and not parallel to other secondaries; 

 nervilles numerous, irregular, broken, approximately at right angles to 

 the secondaries; finer nervation beautifully j)reserved, forming strongly 

 marked cptadrangular areolae. 



This fine species is represented by a large number of well-preserved 

 specimens. The larger leaves are fully 20 cm. long and 7 or 8 cm. wide, 



