2 PEOCEEDIXGS OF THE NATIONAL MUSEUM vol. 6G 



more of the Green Eiver biota, the comparisons with Florissant will 

 certainly give results of great value and interest. 



(3) The Prote'aceae are in this paper clearly established in the 

 Green River. The previously recorded Lomatia microphylla Les- 

 quereux cannot be considered definitely Proteaceous. 



(4) The Green River biota is by no means strictly or typically 

 tropical though it contains elements suggestive of tropical or sub- 

 tropical conditions. 



HEPATICAE 

 Family JUNGERMANNIACEAE 



LEJEUNEA EOPHILA, new appcies 



Plate 1, fig. 1 



Stem fairly stout, normal, bearing poorly preserved thin rounded 

 leaves, apparently 3 mm. long or less, and well developed bifid under- 

 leaves, the latter about three in 5 mm. of stem; underleaves with 

 very stout bases, the lobes more or less unequal, one thick, the other 

 slender, both pointed, with their outer sides convex and inner con- 

 cave; length of vnclerleaf about 1.5 mm. The specimen consists of 

 about 16 mm. of stem, with le'aves. 



Green River shales, head of East Alkali Gulch, about 8 miles 

 south of DeBeque, Colorado ; collected by John P. Byram in 1922. 



Holotype.—C2it. No. 36851, U.S.N.M. 



So far as can be seen, this does not differ from modern Lejeunea. 

 Bifid underleaves and other characters readily distinguish it from 

 J ungermanniopsis cockerelU Howe and Hollick of the Florissant 

 Miocene. Lejeunea eophila is the oldest known member of the 

 Jungermanniaceae. It might have existed in a tropical or sub- 

 tropical habitat. 



EQUISETALES 

 Family EQUISETACEAE 



EQUISETUM WYOMINGENSE Lesquereux 



Green River shales, head of East Alkali gulch, about 8 miles 

 south of DeBeque, Colorado (J. P. Byram 1922). New to Colorado. 



Family SCHIZAEACEAE 



LYGODIUM KAULFUSSII NEUROPTEROIDES (Lesquereux) 



Lygodium neuropteroides Lesquereux, U. S. Geol. and Geogr. Surv. Territ., 

 Annual Report for 1870, p. 384. 



Since the Green River plant is not strictly identical with the 

 Euroj)ean Eocene form, it seems best to retain the name proposed by 

 Lesquereux in a subspecific sense. 



