82 MESOZOIC FLORAS OF UNITED STATES. 



ordinary form of Tcenio-pteris vittata in its unchanging width, through- 

 out the specimen, indicating a very long and narrow leaf which must 

 have been ribbon-shaped. It shows no lateral nerves. 



PI. XIII, Fig. 4, gives the lateral part of a leaf of the larger size, 

 which shows a considerable part of the stipe. Fig. 5 shows the basal 

 portion of a leaf of medium size. Fig. 6 represents the abnormally 

 long and narrow leaf above referred to. Fig. 7 is a view of a fragment 

 that shows the nerves, and Fig. 8 is a portion of this enlarged. 



This plant is most common at locality No. 7, where it is abundant 

 and occurs with Tceniopteris major, several of each sometimes being 

 found in the same hand specimen of rock. It is found also at localities 

 Nos. 1, 2, 4, 16, 17, and 19. 



T^NiopTERis ? OREGONENSis Fontaine n. sp. 

 PI. XIII, Figs. 9, 10. 



At locality No. 8 was found a single imprint, with its reverse, of a 

 plant of tseniopterid character. It is 5 cm. long and 1 cm. wide, with no 

 marked change in width, indicating a leaf of considerable length in 

 proportion to its width. The midnerve is proportionally strong and no 

 lateral nerves are shown distinctly, as the leaf substance is rather thick. 

 Traces of them, however, can be made out. They seem to go off at right 

 angles to the midrib. It could not be determined whether they branch or 

 not. Possibly this may be the same species with the narrow form placed 

 in Taniopteris vittata, but the leaf is much smaller. This fossil is much 

 like the plant given by Heer as Cycadites sibiricus," which is evidently not 

 a Cycadites, but rather some form of Tseniopteris. As the amount of 

 material does not suffice to fix the character of the plant, its position must 

 be left doubtful. PL XIII, Fig. 9, represents the only specimen seen, 

 and Fig. 10 a part of this enlarged. 



Genus MACROT^.NIOPTERIS Schimper. 



Macrot^niopteeis californica Fontaine. 



PI. XIV, Figs. 1-4. 



1896. Macrotxniopteris californica Font.: Am. Journ. Sci., 4th ser.. Vol. II, p. 274 



(nomen) . 

 1900. Macroteeniopteris californica Font.: Twentieth Ann. Rep. U. S. Geol. Surv., 

 1898-99, Pt. II, p. 349, pi. liii, fig. 1; pi. liv., figs. 1, 2. 



aFl. Foss. Arct., Vol. V, Pt. II, pp. 16-17, pi. iv, fig. 1. 



