Maktland Geological Survey 331 



Description. — Apparently tripinnatifid, more open and with the ulti- 

 mate segments shorter and broader than in the following species. Lower 

 pinnules divided almost to the rachis becoming reduced through lobed 

 to simple pinnules distad; summits obtusely rounded, minutely toothed. 

 Venation flabellate. Veins repeatedly forked, the ultimate branches end- 

 ing in the marginal teeth. 



This species is very close to the following, of which it is made a va- 

 riety by Professor Seward, who states that the English material shows 

 many intermediate forms, although the extremes are different enough. 

 As the scanty American material lacks intermediate forms it has seemed 

 best to treat it as belonging to a distinct species at the same time recog- 

 nizing its resemblance to the following and the possibility that more 

 representative material might demonstrate their identity. 



Occurrence. — Patuxent Formation. Dutch Gap, Virginia. Patapsco 

 Formation. Federal Hill (Baltimore), Maryland. 



Collection. — U. S. National Museum. 



EuFFORDiA GcEPPKETi (Dunker) Seward 

 Plate XXIII, Figs. 3, 4 



OheilantMtes Gcepperti Dunker, 1844, Norddeutsch, Walderthon, Programm 



der hoheren Gewerbschule in Cassel, 1843-1844, p. 6. 

 Sphenopteris Ocepperti Dunker, 1846, Mongr. d. Norddeutsch. Wealdenbild- 



ung, p. 4, pi. i, fig. 6; pi. ix, figs. 1-3. 

 Sphenopteris Gcepperti Bronn, 1848, Index pal., vol. 2, p. 1168. 

 Sphenopteris Gcepperti Brongniart, 1849, Tableau, p. 107. 

 Sphenopteris Gcepperti linger, 1850, Gen. et Sp., p. 109. 

 Sphenopteris Hartlebeni Dunker, op. cit., p. 4, pi. ix, fig. 9. 

 Sphenopteris Hartlebeni Bronn, loc. cit. 

 Sphenopteris longifolia Dunker (non Phillips nee. Feistm.) op. cit., p. 4, 



pi. viii, fig. 6. 

 Sphenopteris adiantifro7is Bttingshausen, 1851, Jahrb. d. k. k. Geol. Reichs- 



anst, Jahrg. II, p. 157. 

 Sphenopteris Jugleri Ettingshausen, 1852, Beitr. z. Fl. d. Wealdenperiode, 



p. 15, pi. iv, fig. 5. 

 Sphenopteris Hartlebeni Schimper, 1869, Pal. Veget., tome i, p. 394, pi. xxx, 



figs. 2, 3. 

 Sphenopteris longifolia Schimper, IMd. 

 Sphenopteris Jugleri Schimper, IMd. 

 Sphenopteris Auerhachi Trautschold, 1870, Der Klin'sche Sandstein, Nouv. 



Mem. Moscou, vol. xiii, p. 207 [19], pi. xviii, fig. 5. 



