320 PROCEEDINaS OF THE NATIONAL MUSEUM. vol. 41. 



deposits (Belgium, Germany, Austria), but in the Neocomian of 

 Portugal and Japan, and in the Uitenliage series of South Africa. 

 Material obtained from Japan shows obscure fruiting fragments in 

 which the pinnae are narrowed, and there is apparently a single sorus 

 to each pinnule.^ The species is also reported from the Albian of 

 Portugal by Saporta. In America it is not rare in the Potomac beds 

 and rather doubtful remains are referred to this species from the 

 Shasta beds of California. It is probably represented in the Kootenai 

 formation of Montana by Dryopteris m,ontanense (Fontaine) Ivnowl- 

 ton.2 Professor Seward in a recent paper ^ expresses his belief that 

 this species is identical with Cladoplilehis hrowniana, such differences 

 as are observable bemg merely individual and not specific. This 

 may be the case as the two are certainly closely allied. There is, 

 however, serious danger in unitmg under a smgle specific name fern 

 fronds from all quarters of the globe which resemble each other, 

 unless the evidence of their identity is very strong. 



Occurrence. — Patuxent formation: Woodbridge, Fredericksburg, 

 Dutch Gap, Telegraph Station (Lorton), Virginia. Patapsco forma- 

 tion: Chinkapin Hollow, Virginia. 



Collections. — ^United States National ]\fuseum. 



CLADOPHLEBIS VIRGINIENSIS Fontaine, emended. 



CladopMebis virginiensis Fontaine, Monogr. U. S. Geol. Surv., vol. 15, 1890, p. 70, 



pi. 3, figs. 3-8; pi. 4, figs. 1, 3-6 (not Fontaine, 1906). 

 CladopMebis falcata Fontaine, Monogr. U. S. Geol. Surv., vol. 15, 1890, p. 72, 



pi. 4, fig. 8; pi. 5, figs. 1-6; pi. 6, fig. 7; pi. 7, figs. 1, 2.— Fontaine, in Ward, 



Monogr. U. S. Geol. Surv., vol. 48, 1906, pp. 227, 280, 511, 548, pi. 65, figs. 



12-14; pi. Ill, fig. 6.— Knowlton, in Diller, Bull. Geol. Soc. Amer., vol. 19, 



1908, p. 386. 

 CladopMebis acuta Fontaine, Monogr. U. S. Geol. Surv., vol. 15, 1890, p. 74, pi. 5, 



fig. 7; pi. 7, fig. 6; pi. 10, figs. 6, 7; pi. 11, figs. 7, 8; pi. 166, fig. 5.— Fon- 

 taine, in Ward, Monogr. U. S. Geol. Sm-v., vol. 48, 1906, p. 538, pi. 114, 



figs. 3, 4. 

 TMmnfeldia variabilis Fontaine, in Diller and Stanton, Bull. Geol. Soc. Amer., 



vol. 5, 1894, p. 450.— Fontaine, in Stanton, Bull. 133, U. S. Geol. Surv., 



1896, p. 15. 

 CladopMebis acuta angustifolia Fontaine, in Ward, Monogr. U. S. Geol. Surv., 



vol. 48, 1906, p. 539, pi. 114, fig. 5. 

 Asplenium distans Dawson, Trans. Roy. Soc. Can., vol. 3, sec. 4, 1886, p. 5, pi. 3, 



fig. 7 (not Heer). 

 TMnnfeldia vwntanensis Fontaine, in Weed and Pirsson, 18th Arm. Kept. U. S. 



Geol. Surv., 1896-97 (1898), pt. 3, p. 481. 

 CladopMebis falcata montancnsis Fontaine, in Ward, Monogr. IT. S. Geol. Surv., 



vol. 48, 1906, p. 291, pi. 71, figs. 14-20. 

 CladopMebis oblongifolia Fontaine, Monogr. U. S. Geol. Siu^., vol. 15, 1890, 



p. 74 (part), pi. 7, figs. 3, 4 (not fig. 5, wfiich is referred to C. hrowniana). 



» Nathorst, Denkschr. k. Akad. Wiss. Wien, vol. 57, 1890, pi. 4, figs. 3-5; of these fig. 3 is referred to 

 Weichselia viantelli by Seward, 1894. 



2 Fontaine, Proc. U. S. Nat. Mus., vol. 15, 1892, p. 490, pi. 82, figs. 1-3; pi. 83, figs. 2-3o. 



8 Sewaxd, Ann. S. Afr. Mus., vol. 4, 1903, p. 10. 



