26 
Only detached leaves are scattered on several specimens, and some 
are much like pinnules of some fern. The leaves are small, varying in size 
from 7 mm. to more than 13 mm. in length and from 5 mm. to 10 mm. in 
maximum width; orbicular or broadly ovate, rounded or more or less 
truncate at the base or at the apex, some a little narrowed to the base and 
some narrowed to the apex; entire but slightly undulate on upper margins. 
No petiole is preserved. The nervation is not quite distinct, some show a 
comparatively thick midrib with 6 or 7 secondary nerves on each side; the 
midrib being more or less curved and centric; the secondaries diverging 
from the midrib at angles of more than 30 degrees in the lower part and less 
than 30 degrees in the upper part, bifurcating below the middle and reach- 
ing the margins, the basal ones joining the midrib at the base and likely to 
be opposite, the upper ones mostly alternate. The nervilles are not 
clearly seen. 
There can be no question of the identification of the present specimens, 
but most students regard their reference to the genus Trapa as highly 
problematical. The present species has been recorded from a variety of 
horizons from the Belly River Cretaceous to the Fort Union. Whether 
these records represent a single botanical species or not I am not prepared 
to say, but whatever it may be or how widely it may range Trapa (?) 
microphylla is especially abundant in the Lance and Fort Union horizons. 
Occurrence. Estevan beds, along road up a hill SW. J sec. 28, tp. 7, 
range 3, W. 4th mer. 
Order, Rubiales 
Family, caprifoliaceae 
Genus, Viburnum Linn6 
Viburnum limpidum Ward 
Viburnum limpidum Ward, U.S. Geol. Surv., Sixth Ann. Rept., p. 556, 
PI. 63, figs. 1-4, 1886; Bull. 37, p. 110, PI. 53, figs. 3-6, 1887. 
The leaf is not completely preserved, but the venation is distinct. 
It is ovate, about 70 mm. long and about 52 mm. in maximum width; 
narrowed and rather rounded at the base, likely to be bluntly pointed at 
the apex ; serrate on the upper margins and entire at the base. The venation 
is ascending pinnate, with the mid vein more or less curved in somie parts; 
the secondary veins about seven on each side, diverging from the midvein 
at angles of from 35 degrees to 60 degrees, mostly curving upward, branching 
near and above the middle, and craspedodrome ; the nervilles distinct and 
simple, mostly parallel each other and percurrent. 
It very much resembles Ward’s figures in outline, size, and especially 
venation. The type is from the Fort Union of Montana. 
Occurrence. Ravenscrag beds, north branch, Frenchman river, SE. j 
sec. 22, tp. 7, range 22, W, 3rd mer. 
