234 MESOZOIC FLORAS OF UNITED STATES. 



entire lateral pinnule, PL LXV, Fig. 30, and the greater portion of a 

 terminal one, Fig. 31, occur among the impressions. These fossils can 

 not well be distinguished from Schenk's Sagenopteris Mantelli,'' which 

 occurs in the Wealden formation of North Germany. The only differ- 

 ence between this and Schenk's fossil is the fact that in the California 

 plant the pinnules are somewhat smaller than the German ones and 

 the midrib in the terminal pinnule more prolonged. The pinnules of 

 this Sagenopteris must hav^been easil}^ detached, for in both the Cali- 

 fornia and the North German specimens they have been found only in 

 a detached condition. This type of Sagenopteris is smaller than the 

 characteristic form of the Rhetic S. Nilsoniana (Brongn.) Ward {S. 

 rhoifolia Presl). 



One small specimen of a Sagenopteris, represented in PL LXV, 

 Fig. 34, was found by Mr. Will Q. Brown "beneath the bridge at Riddles, 

 Oreg." The specimen now in question shows portions of three leaf- 

 lets, so arranged as to indicate that the^^ belonged to the same indi- 

 vidual plant. The most complete leaflet, which was probably the 

 central one of the group, has its basal part nearlj^ complete. It was 

 probably elliptical in form, narrowing wedge-shaped to the base. The 

 end is not preserved. It was probably 3 cm. long. Its greatest width 

 is 13 mm. The best preserved lateral leaflet occurs on the right side. 

 It is unsymmetrical, with the base and end not shown. The midril) 

 disappears about one-thii'd of the distance from the base to the end 

 of the leaflet. The secondarj^ nervation is strong and the anastomosis 

 occurs at short intervals, forming small elliptical meshes. This plant, 

 like the original S. Mantelli, is smaller than the Sagenopterids of the 

 Trias and Jura. It is especially distinguished by the closeness of its 

 anastomosis and its regular meshes.'' 



« Die Foss. Flor. d. Nordwest. Wealdenform., p. 20, pi. x, fig. 5 (Palaeontographica, Vol. XIX, p. 222, 

 pi. xxxi, fig. 5). 



!> The small specimen collected by Mr. Brown on Iron Mountain Creek most probably belongs to this 

 species. In a letter returning it on October 21, 1901, Fontaine says; 



" It is far from being an unrecognizable plant fragment. It seems to hare a pronounced midnerve, running 

 nearly to the end of the leaf, but that, I think, is due mainly to a pucker in the leaf. I think the leaflet is a 

 Sagenopteris, most likely S. Mantelli." It is figured on PI. LXV, Fig. 35. — L. F. W. 



