FONTAINE,] THE OROVILLE FLORA. 359 
the leaflets. The leaflets go off nearly at right angles with the midrib, 
have the same width throughout their length, and are closely placed, 
being only1mm. apart. They are 1 cm. wide, and are very uniform in 
width. The nerves go off nearly at right angles. They are slender, 
but strongly defined, unbranched, and parallel throughout their course, 
being about 10 in number. This fine plant is rather abundant at the 
locality ‘‘In the bed of a ravine that leads from the Banner mine,” 
etc. It occurs in large specimens, the finest of which is given on Pl. 
LXI. It is nearly allied to C. grandifolium, but is clearly a different 
species. : 
CTENOPHYLLUM GRANDIFOLIUM Storrs Fontaine. 
Pl. LIL, Fig. 3; Pl. LXIJ; Pl. LXIII, Fig. 1; Pl. LXVI, Fig. 3. 
1896. Clenophyllum grandifolium Storrsii Font.: Am. Jour. Sci., 4th Ser., Vol. II, 
p. 274, 
This plant can not be distinguished specifically from C. grandifolium 
Font., of the Older Mesozoic of Virginia,’ but although it evidently 
attained a very large size, it was inferior to the Virginia plant, and 
had uniformly narrower leaflets, with fewer nerves. The midrib was 
wide and flat, with apparently no great amount of wood tissue. The 
leaflets go off nearly at right angles with the midrib. They are placed 
far-apart and are separate, being mostly 5mm. from one to another. 
Throughout most of their length they are strap-shaped and narrow, 
near their bases they grow narrower, and at their base, where they 
unite with the midrib, they-are slightly widened. The narrowed por- 
tion appears to have been thick and fleshy. The leaflets must have 
been very long, equaling the Virginia plant in that respect. The 
width of the leaflets, even on the same midrib, was not constant, but 
varied irregularly, although slightly, resembling in this point the Vir- 
ginia fossil. The nerves are very strong, 5 or 6 in number, and either 
single or forking once, at various distances from the midrib. Near 
the midrib they are almost always single, and go off nearly at right 
angles with the midrib, being then parallel. - This nervation differs 
from that of the Virginia plant, in which the nerves fork once at their 
bases and are then single. 
This fine plant was found with several specimens at the locality ‘‘In 
the bed of a ravine that leads from the Banner mine,” etc. Pl. LXII 
represents the most complete fragment found, and Pl. LXUII, Fig. 1, 
a portion of a leaflet enlarged to show the nervation. Other less per- 
fect fragments are represented by Pl. LIU, Fig. 3, and Pl. LXVI, 
se variety is named for Mr. James Storrs, the intelligent assistant 
of Mr. Ward in collecting the Oroville fossils. ‘ 
1Mon. U. 8, Geol. Survey, Vol. VI, pp. 73-76, pl. xxxix, figs. 1-3; pl. xl; pl. xli; pl. xlii, fig. 1. 
