3854 OLDER MESOZOIC FLORAS OF UNITED STATES. 
Subkingdom SPERMATOPHYTA. 
Subdivision GYMNOSPERMAE. 
Class CYCADALES. 
Family CYCADACE. 
Genus PTEROPHYLLUM Brongniart. 
PreROPHYLLUM RAJMAHALENSE Morris? 
Pl. LVI, Figs. 4, 5. 
1868. Pterophyllum rajmahalense Morr.: Mem. Geol. Survey of India, Pal. Ind., Ser. 
II, Foss. Fl. Gondw. Syst., Vol. I, Pt. I, Foss. Fl. Rajm. Series, p. 25, pl. 
xiii, figs. 3-5; pl. xiv. 
Several specimens of a Pterophyllum, which can hardly be separated 
from P. rajmahalense Morr.’ of the Rajmahal flora, were found at the 
locality “‘ Bank of Feather River,” etc. They are imprints of small 
portions of leaves, showing several leaflets on each side of a rather 
slender midrib. They agree especially well with the small form given 
on pl. xiii, fig. 4, of the work of Oldham and Morris. The Oroville 
plant has its leaflets opposite to one another and going off at right 
angles with the stem. They are about 15 mm. long and 5 mm. wide. 
The nerves are about 12 in number. They make right angles with the 
midrib and are slender but distinct. They are parallel throughout 
their entire course and single. The points of difference between the 
Oroville and Indian plants are the smaller size of the midrib in the 
former and the somewhat fewer nerves. The amount of material, 
however, is not sufficient to permit the full character of the plant to 
be made out and its identification must remain in doubt for the present. 
Genus CTENIS Lindley and Hutton. 
CTrENIS GRANDIFOLIA Fontaine. 
Pl. LIII, Fig. 2; Pl. LVI, Figs. 6, 7; Pl. LVII. 
1896. Ctenis grandifolia Font.: Am. Jour. Sci., 4th Ser., Vol. II, p. 274. 
Only fragments of leaves were seen, hence the character of the 
entire leaf can not be determined. The segments, or leaflets, are 
large and ribbon shaped. Their terminations were not seen. They 
are attached by their entire base to the sides of a moderately strong 
midrib. The strongest midrib seen had a width of 4mm. They go 
off nearly at right angles and then curve slightly toward the summit 
of the compound leaf, so as to have a falcate form. They are slightly 
’ 1Fossil Flora of the Rajmahal Series, p. 25, pl. xiii, figs. 3,4, 5. 
