740 A. C. PEALE 
striking. Besides, as Dawson" himself adds, “the few species are 
scarcely sufficient to afford a basis for definite conclusions.’ The 
list for the lower division of Dawson’s Laramie contains eight 
species, of which six are common to both Upper and Lower. Two 
of the species, Onoclea sensibilis and Sapindus affinis, are charac- 
teristic of the Fort Union in both of its divisions on the American 
side of the line. As to the Belly River list, it does not seem to be 
complete, Pistia corrugata, a characteristic Montana flora not being 
included. Adding this to the list, we have ten species, two of 
which, according to Knowlton, should be dropped. Only two of 
those remaining seem to be common to both Belly River and 
Lower Laramie, and this small proportion certainly cannot be said 
to establish a striking resemblance between the two floras. Regard- 
ing the others, Knowlton says? 
As to the affinities of the other named species, it may be mentioned that 
Nelumbo dawsonz is very closely allied to my N. intermedia from Point of Rocks, 
Wyo., while the other two species (Populus latidentata and Acer saskatchewanse) 
are not figured, nor are they described with sufficient fullness to permit of sat- 
isfactory comparison with other forms. 
Stanton’ was probably correct when he said: 
I suspect that in Canada two distinct formations, separated by marine 
beds, have been confused under the term Belly River series, and that a large 
part of the fauna, and possibly also of the flora, was collected from the upper 
horizon, which included the Laramie and possibly even later beds. 
It seems equally true that in this country the same formations 
have been confused. Our knowledge of the flora, of the Lance for- 
mation, has been considerably enlarged in the past few years. The 
Belly River flora, however, is in need of critical study, and until 
that can be done we must content ourselves with the confident 
prediction that the difference between them will be greater than 
now appears; and that when a flora for the Judith River beds is 
developed, its affinities will be with the Lance rather than with 
the Belly River flora indicated above. 
* Trans. Roy. Soc. Canada, IV, sec. IV (1883), pp. 32, 33- 
2 Bull. U.S. Geol. Surv., No. 257, 1905, p. 154; see also ibid., No. 163, 1900, pp. 
Q, Io. 
3 I[bid., No. 163, 1900, p. II. 
4See Knowlton Proc. Wash. Acad. Sci., XI (1909), 179-238. 
