718 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



shape and thick midrib 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 permit it to be readily 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 Artocarpus. 



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

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



MAGNOLIACEJE. 



Magnolia californica ? Lx. 



Magnolia californica Lx.: Foss. PI. Aurif. Gravels, Mem. Mus. Com p. Zool., Vol. VI, 



No. 2, 1S7S, p. 25, PL VI, figs. 5-7. 



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

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

 so much broken that its positive identification is not possible. 



Habitat: Fossil Forest Ridge; Hague's No. 1960. 



Magnolia spectabilis n. sp. 

 PL XOIII, figs. 1, 2. 



Leaves very thick, coriaceous; broadly elliptical-lanceolate in outline, 

 with regularlv rounded base and rather abrupt obtusely acuminate apex; 

 margin perfectly entire, not undulate; midrib thick, straig'ht; secondaries 

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

 on emergence from the midrib, becoming parallel above; secondaries either 

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

 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 preserved, forming strongly 

 marked quadrangular areolae. 



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

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



