JURASSIC FLORA OF DOUCxLAS COUNTY, ORFG. 83 



Three specimens of a fine taeniopteroid plant were found at locality 

 No. 7. It agrees so well witli Macrotcenioptcris catif arnica of ihe OioNJlle 

 flora tluil I have no hesitation in regarding it as the same. The Oregon 

 specimens are l^etter preserved than those found at Oroville and show 

 the margins. The plant must have had a very thick leather-like texture, as 

 it leaves on the rock a decided film of coal. The maximimi width shown 

 is 6 cm. The greatest length seen is 14 cm. and this in a mere fragment. 

 The midnerve is strong. The latei-al nerves are seen with difficuUy. 

 They ai'e mostly imforked and parallel to one another. They are rather 

 remote, being about three-fourths of a millimeter apart. Some are forked 

 at rather more than half way between the midrib and margin. The fork- 

 ing, however, appears, as it were, accidental and not essential. The plant 

 resembles Saporta's Tmiiopteris superhn," but the nerves are more remote 

 and not forked at the l)ase, as in Saporta's fossil. 



PI. XIV, Fig. 1, gives the basal portion of a leaf. Fig. 2 represents 

 a considerable part of a leaf from some distance aljove the liase, indicating 

 a leaf of great length. Fig. 3 gives a fi'agment in which the nerves are 

 visible, and Fig. 4, a portion of this enlarged. 



Family MARSILEACE.E. 

 Genus SAGENOPTERIS Presl.* 

 Sagenopteris Gosppertiana Zigno. 

 PI. XIV, Fig.s. .5-11. 



186.5. Sagenopteri.1 Gceppertiana Zio;ii.: Osserv. sulle Felci Fos.sili delJ'Oolite, p. 30. 



1865. Sagenopteris Brongniartlana Zign.: Loc. cit. 



1865. Sagenopteris Brauniana Zign.: Loc. cit. 



1865. Sagenopteris rofiiridata Zign.: Loc. cit., p. 35. 



1868. ? Sagenopteris Gappertiana Zign.: Fl. Foss. Form. Oolith., Vol. I, p. INN, i)i. 



xxi, figs, la, It), 2-.5; ])!. xxii, figs. 1, 1. 

 1900. Saqenopteris Nilsoniana (Brongn.) Wani: Twentieth Aim. Rep. U. S. Geol. 



Siirv., 1898-99, Pt. II, p. 352, pi. Ivi, fig. 1; pi. Ixvii, fig. 2. 



«Plaiitos Jura.ssi(iucs, Veil. I, pp. 4:W-441, pi. Ixi: pi. Ixii, lip;. 1. 



''Potoiiic, who is working \ip the Pteridopliytii for Kii{;lfr and Prantl'.^ Natiirliclic I'llanzi^nraniilicMi, 

 classes this genus in the Marsileacea', following the views of Heer, Zigno, Fei.stinantel, Nathoist, and otliers; 

 but Count Solms-Laubach sees reason to doubt the correct ne.ss of this, and Seward treats Sagenopteris as a 

 fcm, classing it now (Jur. Fl. Yorkshire Coast, 19(X), p. Ifil ) in the family Polyi)odiai-eie. alllumgli in liis 

 Wealdcn Flora, I,S94, p. 120, he placed it in the SchizeaceiP. — L. F. W. 



