47 
Nilsonia schaumburgensis (Dunker) Nathorst 
Plate VII, figure 5 
PterophyUum schaumburgensis Dunker, Mon. Norddeutsch. Wealdenbild., 
p. 15, PI. 1, fig. 7; PL 2, fig. 1; PL 6, figs. 5-10 (1846). 
Anomozamites schaumburgensis Schimper, Pal. v%6t., tome 2, p. 141; 
Atlas, Pl. 70, figs. 5, 6 (1870). 
Schenk, Palseont., Bd. 19, p. 231, PL 33 (1871). 
Nilsonia schaumburgensis Nathorst, Denks. k. Akad. Wiss. Wien, Bd. 57, 
p. 45, Pl. 1, figs. 6-9 (1890). 
Yokoyama, Jour. Imp. Coll. Sci. Japan, vol. 7, p. 227, Pl. 20, figs. 12, 
14; PL 21, fig. 14; PL 22, figs. 5-7 (1894). 
Seward, Wealden Flora, pt. 2, p. 53, tf. 3 (1895). 
Fontaine, in Ward, TJ.S. Geol. Surv., Mon. 48, p. 303, Pl. 72, figs. 
17-21 (1906). 
Knowlton, Smith. Misc. Coll., vol. 4, pt. 1, p. 123 (1907), 
Nilsonia pasaytensis Penhallow, Trans. Roy. Soc., Canada, 3d ser., vol. 1, 
sec. 4, p. 307, tf. 3 (1907). 
Angiopteridium stridinerve Fontaine, U.S. Geol. Surv., 18th Ann. Rept., 
pt. 3, p. 481 (1898). 
This small, mostly divided frond type of Nilsonia is exceedingly wide- 
spread in the Lower Cretaceous. Described originally from material from 
the Wealden of Germany, it is present in deposits of that age in England. 
It has been recorded from the Neocomian of Japan; from the Knoxville 
and Horsetown beds of California; and from the Kootenay at several 
localities in Montana. I can see no appreciable difference between the speci- 
mens from the Kootenay of Alberta and illustrations of the European type 
on the one hand and the Asiatic Lower Cretaceous specimens on the other. 
The species shows considerable variation in size, but in general it is 
long and narrow and usually segmented. Specimens collected by Daly 
along the International Boundary between Pasayten and Skagit rivers in 
British Columbia were recorded as Nilsonia pasaytensis by Penhallow. 
The species is probably closely related to, if not identical with, Nilsonia 
nigracollensis described by Wieland from the Lakota formation of South 
Dakota, and recorded from the Morrison formation of Wyoming, the 
Kootenay of Montana, and the Bull Head Mountain sandstone of British 
Columbia. 
Nilsonia schaumburgensis can be distinguished with difficulty, if at all, 
from the Jurassic Nilsonia nipponensis Yokoyama, or the widespread 
Jurassic Nilsonia compta (Phillips) Goeppert. 
Occurrence. Not uncommon at the Kootenay locality CK1. 
Genus, czekanowskia Heer 
Czekanowskia sp. 
Plate VIII, figures 1-3 
A species of this interesting genus is not uncommon at three localities 
in the Kootenay of Alberta. The material is important in that it demon- 
strates the dichotomous habit of the leaves, and a specimen and its counter- 
part from Nez Perce creek near the McGilhvray mine (locality COl) shows 
