228 MESOZOIC FLORAS OF UNITED STATES. 



PI. LXV, Fig. 12 gives the greater portion of one of the larger pinnules, 

 all that is preserved, and Fig. 13 represents a fragment of an ultimate 

 pinna. This is the largest fragment that was found. Fig. 14 shows the 

 small fragment formerly referred with doubt to Thinnfeldia variabilis. 



This fossil is found at localities Nos. 9, 14, 18, 19, 20, and 22. It 

 is most abundant at locality No. 22. 



Cladophlebis Ungeri (Dimker) Ward n. comb.'^' 



PI. LXV, Figs. 15, 16. 



1846. Pecoj^feris Ungeri Dunk. : Monogr. d. Norddeutsch. Wealdenbildung, p. 6, 



pi. ix, fig. 10. 

 1846. Pecopieris folymorjylia Dunk, [non Brongn.]: Op. cit., p. 6, pi. vii, fig. 5. 

 1869. Pecopteris Dunkeri Schimp.: Pal. Veg., Vol. I, p. 539. 

 1877. Pecopieris exiliformis Geyler: Palaeontographica, Vol. XXIV, p. 226, pi. xxx, 



fig. 1. 

 1890. Asjndimn Dunkeri (Schimp.) Font.: Potomac Flora (Monogr. U. S. Geol. 



Surv., Vol. XV), p. 101, pi. xxii, figs. 9, 9a, 9bj pi. xxv, figs. 11, 11a,. 12; 



pi. xx\d, figs. 2, 2a, 8, 8a, 9, 9a, 18, 18a; pi. liv, figs. 3, 3a, 9, 9a. 

 1894. GladofMelns Dunleri (Schimp.) Sew.: Wealden Flora, Pt. I, p. 100. pi. vii, 



fig. 3. 

 1894. Aspidium DunJceri (Schimp.) Font.? Fontaine in Diller & Stanton: Bull. 



Geol. Soc. Am., Vol. V, p. 450. (PL LXV, Fig. 16.) 

 1895 [1896]. Aspidium Dunkeri (Schimp.) Font.? Fontaine in Stanton: BuU. U. S. 



Geol. Surv., No. 133, p. 15. (PI. LXV, Fig. 16.) 



Two small bits of a fern were found at locality No. 9 which can not 

 be distinguished from the plant named Pecojderis Dunkeri by Schimper. 

 This, from the finding on it, in the Lower Potomac of Virginia, of sori 

 like Aspidium, *" I regard as an Aspidium." The California specimens 



« Schenk, who had seen Dunker's specimens says (Palaeontographica, Vol. XIX, p. 215) that he is unable to 

 distinguish his Pecopieris Ungeri from his P. polymorpha, and treats them as synonyms, as did Schimper (Pal. 

 Veg., Vol. Ill, p. 499) and as does also Mr. Seward (Wealden Flora, Pt. I, p. 100). As the P. polymorpha was 

 preoccupied b}' the well-known Carboniferous species so named by Brongniart in 1S28, Schimper (Pal. Vi5g., 

 • Vol. I, p. 539) renamed it P. Dunlcen. before Schenk had pointed out its identity with P. Ungeri. That specific 

 name must be restored to it, and as there is a pretty general agreement that it belongs to Cladophlebis the 

 above combination necessarily results. — L. F. W. 



t> Monogr. U. S. Geol. Surv., Vol. XV, pp. 101-102, pi. xxii, figs. 9, 9a. 



''Apropos ef this Mr. Seward saj'S (Wealden Flora, Pt. I, p. 102): "Fontaine's examples of Aspidium 

 Dunkeri undoubtedly belong to that species, but the fertile pinnule, pi. xxii, fig. 9a, on which apparently the 

 reference to Aspidium is based, seems hardly sufficient evidence for assuming identity with the recent genus." 

 If, however, this species is thus demonstrated to have the indusia of Dryopteris, that seems to establish the 

 reproductive characters of the genus Cladophlebis, hitherto unknown. — L. F. W. 



