Sree CRETACEOUS FLORA, 15 
paratively thick, straight; secondaries numerous, alternate; slender, at an acute angle of 
divergence, parallel, except those of the lower pair, more oblique and prolonged reticulate in 
the intervals. 
One of the leaves (PI. A, f. 6), is 6cm. long, nearly 2 cm. broad below the middle, 
with a petiole 6 mm. long; has the characters of the species as described by Heer, J. c., 
from specimens of the Middle Cretaceous of Greenland. 
The reticulation of the nervilles is obscure, the lateral veins being thin, and 
obsolete in the upper part, and thus the leaf appears at first like that of a Salix, but 
traces of the transverse nervilles are seen in the lower lateral veins, as marked upon 
the figure, quite as well as they would be observed upon the specimens from Atane, 
_figured by Heer. The other leaf, which I refer to the same species (PI. B f. 5), is longer 
and more linear, without any trace of nerves. It is remarkably similar to some of 
the figures of Heer, /. c., especially to f. 2 of Pl. XIX, and f. 4 of Pl. XX, and as these 
figures have scarcely any nerves distinctly seen, the absence of secondaries may be 
merely casual. However, the reference is not conclusive, as none of the figured 
leaves of Heer have the upper part represented. Another species also of the Creta- 
ceous of Greenland, Myrica longa Heer, Arct. Fl. VI, Part 2, p. 65, Pl. XVIII, £.9 b; 
Pl. XXIX, f. 15-17; Pl. XXIII, f. 10, has the leaves about of the same form and size 
without any nerves, but these leaves are rather linear than lanceolate, and broadly 
obtuse at the apex. The relation is therefore less clearly marked than with Laurus 
plutonia. 
Hab. North side of Big Cottonwood river, near New Ulm, Minnesota. 
Mus. Reg. No. 5157 C. The other is from Mankato. No. 5666 A. 
LAURUS NEBRASCENSIS Lesqz. 
PLATE A, FIG. 7. 
(Oi 9 Tt SW ep al a. Gn ew ln a OG) 8 Ee WP 
Leaves coriaceous, elliptical-oblong or narrowly lanceolate, obtusely pointed, tapering 
downward to a short, thick petiole; medial nerve thick, half round; lateral nerves at an 
acute angle of divergence, camptodrome. 
The leaf is somewhat longer and narrower than the one /. ¢., Pl. X, f. 1, but it is 
of the same size as that of Pl. XXVIII, f. 14. It is easily identified by the very thick 
medial nerve continuous to a short terete petiole. The species is not rare in the 
Dakota group, both in Nebraska and Kansas. Another species also frequently found 
in Kansas, and closely allied is L. proteifolia Lesqx., Cret. and Tert. Fl., Pl. IL, f. 9 
