DESCRIPTIONS OF SPECIES. 3 



Among hundreds of specimens from Green River which I have 

 examined there are very few which have the lobes of the pinnae as narrow 

 as are represented in the plates and descriptions of the fossil plant, and 

 none which can be compared with the narrower and more undulate forms 

 given by Gardner on PL VII, figs. 1 and 4, of Eocene Ferns. However, 

 the nervation is essentially the same, and the fructification which has been 

 recently found presents no obvious points of difference. I am therefore 

 inclined to accept the view of Messrs. Gardner and Ettingshausen that all 

 these so closely resembling fronds of Lygodium found in the later Creta- 

 ceous and older Tertiary rocks of Europe and America should be regarded 

 as belonging to one species. 



From the coal-bearing rocks of Fletts Creek and Carbonado, Wash- 

 ington, I have a few fronds and fragments of fronds of a species of Lygo- 

 dium which offer no characters by which they can be distinguished from 

 those found in the Green River group, and it seems to me probable that we 

 have in all these specimens relics of one of those widespread and long-lived 

 species which occur at different geological horizons among both animal and 

 plant remains. 



Formation and locality: Tertiary (Green River group). Green River, 

 Wyoming. 



Anemia perplexa Hollick. 1 



PL XV, figs. 1, la; XVI, fig. 3; LXIII, figs. 1-4. 

 Splienopteris (Asplennom) elongatiwn Newb. Boston Joum. Nat. Hist., Vol. VII 



(1863), p. 511. 

 Asplenium suhcretaceum Sap. ? Fl. Foss. Sez. , Mem. Soc. Geol. France, Ser. II, Vol. 



VIII (1868), p. 315, PI. XXIII, fig. 4. 

 Gymnogramma Haydenvi Lesq. ? Hayden's Ann. Rept. 1871 [1872], p. 295; Tert. 



PL (1878), p. 59, PL V, figs. 1-3. 

 Anemia subcretacea (Sap.). GarcL and Ett. ? Monog. British Eocene Flora, Vol. I, 



Pt. II (1880), p. 45, Pis. VIII, IX. 



"Frond bi- or tri-pmnate; pinna?, lanceolate, or linear, acute; lower 

 ones broadly lanceolate, pinnatifid at base, margins deeply double-toothed, 



1 Under the rules of nomenclature as now accepted the original specific name given to this plant 

 by Dr. Newberry can not be retained, as it is antedated by that of a living species — Asplenium 

 elongatum Swartz (1806). 



The relationships of the foreign, western, and eastern United States forms are further discussed 

 by Dr. Newberry in his Flora of the Amboy Clays (Mon. U. S. Geol. Surv., Vol. XXVI, pp. 38-42), 

 under the species of Asplenium and Anemia there described. 



Dr. Newberry evidently intended to maintain the species now described and figured as distinct, 

 and as the original name is not available I have been obliged to adopt an entirely new one. — A. H. 



