82 MESOZ(n(^ FLOl^AS OF UNITED STATES. 



ordinal-}- form of Tdniopteris vittain in its unchanging width, through- 

 out the specimen, indicating a very long and nai'row leaf which must 

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



PL 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 antl 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 Xo. 7, where it is abundant 

 and occurs wdth Tirniopteris mnjor, several of each sometimes being 

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

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



T^XIOPTEHIS ? OREGONENSIS FoiltaillO 11. sp. 



Pi. XIII, Figs. 9, 10. 



At locality No. S was founti 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 Tceniopteris 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 Taeniopteris. 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.ENIOPTERIS Schimper. 



Macrot.«;niopteris californica Fontaine. 



PI. XIV, Figs. 1-4. 



1896. Macrotxniofteris californica Font.: Am. Journ. Sci., 4th ser., VoL II, p. 274 



(nomen). 

 1900. Miicrot^ n'loptcvlti californica Font.: Twentietli Ann. Rep. U. S. Geol. Surv., 



1N9S-99, Pt. II, p. 349, pi. liii, fig. 1; pi. liv., figs. 1, 2. 



"Fl. Foss. Arrt., Vol. V. ?l . II. pp. 10-17. pi. iv. fij. 1. 



