FONTAINE. ] THE OROVILLE FLORA. 357 
CTENIS OROVILLENSIS Fontaine. 
Pl. LVIII, Fig. 4. 
1896. Ctenis orovillensis Font.: Am. Jours Sci., 4th Ser. , Vol. II, p. 274. 
The most complete specimen, given in Fig. 4, shows the basal por- 
tions of several leaflets, placed on each side of the midrib of the com- 
pound leaf. They are subopposite, closely placed, at right angles 
with the midrib, and have expanded bases, so that they are separated 
by a V-shaped sinus, while at their bases they are apparently united 
to form a narrow wing. The leaflets vary somewhat in width, but not 
so much as those of C. grandifolia. The nerves are strong and dis- 
tinct, but not so much so as those of the two previously described 
species. Those in the middle portion of the lamina go off at right 
angles, while those near the upper and lower margins of the same go 
off at obtuse angles and arch away from the midrib to enter the leaf- 
let. The nerves anastomose rather rarely at and near the midrib and 
more freely at the distance of about 25mm. above the midrib. They 
anastomose again more freely at about 5cm. above the midrib. Hence 
the free anastomosis occurs at intervals of about 25 mm., forming elon- 
gate meshes, with a similar length. 
Several specimens of this plant are found at the locality ‘‘In the 
bed of a ravine that leads from the Banner mine,” etc. Like C. grandi- 
folia, this plant reminds one of the large Pterophylla of the Rajmahal 
series. It may bea form of C. grandifolia, but has not the facies of 
that plant. The leaflets also are smaller, with a thinner texture, and 
they are of more uniform width. ‘The leaflets in shape, size, and tex- 
ture resemble those of Ctenophyllum Wardii, which will be next 
described, but this latter has no reticulation in the nerves. 
Genus CTENOPHYLLUM Schimper. 
CTeNOPHYLLUM Warpi Fontaine. 
Pl. LIX; Pl. LX; Pl. LXVI, Fig. 5. 
1896. Ctenophyllum Wardii Font.: Am. Jour. Sci., 4th Ser., Vol. II, p. 274. 
Entire leaves not seen. Probably they were nearly a meter long. 
The largest fragment seen showed only the middle portion of a leaf, 
with no sensible diminution in the leaflets from one end to the other. 
It is 26 cm. long, with a slender midrib, not more than 2 mm. wide. 
A number of leaflets go off on each side of this, none of which are 
entire. The leaflets are quite far apart, having a distance of about 
15mm. They are subopposite and ribbon-shaped. They are separate 
to their bases, which are decurrent on their lower sides and slightly 
rounded off on the upper ones. They do not alter in width through- 
