43 
although superficially they are not exactly alike, the vegetative part of 
the pinnule being considerably less reduced in the Kootenay material. 
It is possible that the two represent distinct species, but as I have but a 
single small specimen from each locality there is no opportunity to test 
the amount of variation. However, in the material described by Fontaine 
from the Kootenay of Montana and the Knoxville of California there is a 
quite considerable range of variation in the shape of the fructifications, 
their size, and the extent to which the lamina of the pinnule has disappeared 
which leads me to think that they all represent a single botanical species. 
I have transferred it to the genus Coniopteris which it seems is more 
appropriate than Dicksonia. 
Occurrence . Kootenay; locality CK1 (Plate VII, figures 1, 2). Lower 
Blairmore; locality CHS (Plate VII, figures 3, 4), 
Genus, acrostichopteris Fontaine 
Acrostichopteris fimbriata Knowlton 
Acrostichopteris fimbriata Knowlton, Smith. Misc. Coll., vol. 50, p. 110, 
PI. 11, figs. 3, 3a (1907). 
The genus Acrostichopteris is exceedingly abundant and varied 
throughout the Potomac Group of the Atlantic Coastal Plain, occurring 
also in the Jurassic and Wealden of England. It is present also in both 
the Lakota and Fuson formations of the Black Hills in Wyoming, but has 
not been recorded from the Knoxville formation of the Pacific Coast region 
nor from the Koine beds of western Greenland. In so far as the record is 
known the genus is sparingly represented in the Kootenay by the present 
species, heretofore known only from the Montana area. The genus is not 
known in the Lower Blairmore. As its describer has pointed out the 
present species is similar to the east coast Acrostichopteris parvifolia Fon- 
taine, and also much like the English Wealden species, Acrostichopteris 
raff or di Seward. 
Occurrence. Kootenay; locality CQ4. 
Cycadophyta 
Genus, fterophyllum Brongniart 
Pterophyllum acuMpennis (Heer) Berry 
Zamites acutipennis Heer, Zeits. Deutsch. Geol. Gesell. Bd. 24, p. 161 
(1872). Flora Fossilis Arctica, Bd. 3, ab. 2, p. 66, PI. 15, figs. 
3-5; Pl. 16, fig. 10 (1874). 
Dawson, Trans. Roy. Soc., Canada, vol. 3, sec. 4, p. 7, PI. 1, fig. 5 
(1885). 
Zamites apertus Newberry, Am. Jour. Sci., vol. 49, p. 199, PI. 14, figs. 4, 5 
(1891). 
Knowlton, Smith. Misc. Coll., vol. 50, p. 121, PI. 13, fig. 5 (1907). 
This species, as I conceive it, shows considerable minor variation in 
the width and length of the pinnules and the degree of obtuseness or 
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