FOSSIL PLANTS 
*53 
whence they are rather abruptly rounded to the obtuse apex; margin 
obscurely but relatively finely serrate except in the basal portion ; mid¬ 
rib very thick, straight; secondaries numerous, about 18 pairs, very 
strong, alternate, at somewhat irregular distances, arising at an angle 
of about 45 0 , slightly curving upward, usually with several craspedo- 
drome branches near the margin, campto-craspedodrome; the secon¬ 
daries usually arching just at the margin and joining the one next above 
with small nervilles, numerous, very prominent and deeply marked, 
mainly once broken though often percurrent and at right angles to the 
secondaries. Lateral leaflets of various sizes but in general much 
smaller than the terminal, elliptical-oblong in outline, abruptly rounded 
and very unequal-sided at base, moderately acuminate at apex ; margin 
and nervation practically the same as in the terminal leaflets. 
This fine species is represented by a dozen or more examples, 
several of which are nearly perfect. The terminal leaflets are from 13 
to about 23 cm. long and from 7 to 12 cm. wide, while the lateral 
leaflets are from about 8 to probably 15 cm. long and from 3.5 to 8.5 
cm. wide. These leaflets are mainly detached, but occasionally two or 
more are found closely associated and overlapping, and in one instance 
matted together in such a way as to suggest the probability of former 
union. There are also preserved in association with them objects that 
look very much like the rachis of a large compound leaf, but there is no 
actual evidence to show that these leaflets were ever borne on them. 
This species would seem to find its nearest relative in Hicoria 
( Cary a) antiquora (Newb.) K11. 1 That species also has large, cori¬ 
aceous leaflets, but they differ in shape and in the configuration of the 
margin, being regularly finely serrate. The nervation is of much the 
same type. 
Family BETULACE® 
Betula (branch), 
pi. xxiv, fig. 2. 
The collection contains a single fragment of a branch showing the 
lenticels characteristic of this genus. The branch was about 1 cm. in 
diameter. 
Corylus macquarrii (Forbes) Heer. 
Corylus macquarrii (Forbes) Heer, Urwelt d. Schweiz, p. 321, 1865. 
The collection contains a large number of leaves that belong to this 
well-marked species. 
1 Cf. Lesquereux, Tert. FI., p. 289, pi. lvii, figs. 1-5, 1878; Newberry, Later 
Extinct Floras, p. 35, pi. xxxi, figs. 1-4, 1898, 
