332 ROYAL SOCIETY OF CANADA 
Shasta series, at Pettyjohn’s Ranch, Tehama County, California, in 
1882, by the one after whom it was subsequently named by Fontaine. 
Heretofore it has not been correlated with any particular horizon, for, 
as Ward observes, “all that can be said of it is that its age might be 
either Lower or Upper Cretaceous” (57: p. 233). Nevertheless, its 
present occurrence in the Skagit river district definitely confirms its 
character as a Lower Cretaceous type, and at the same time it enables 
us to definitely correlate the deposits in which it was found, with those 
to which Aspidium fredericksburgense belongs. It may thus be con- 
fidently asserted that locality 1428 is of the Shasta series. This con- 
clusion gains somewhat in force through the circumstances that locality 
1436 shows the remains of fern stipes which have been found to be 
those of Gleichenia, presumably of G. gilbert-thompsoni. 
Locality 471 is wholly represented by highly altered specimens 
which have been identified as the rachises of a fern, in all probability 
of Gleichenia. If this deduction, which is based upon very scanty 
and poorly preserved material, in which specific characters are not at 
all recognizable, should ultimately prove correct, we have once more a 
means of establishing a general correlation between the somewhat 
isolated Cretaceous areas of British Columbia. A tentative conclusion 
with respect to 471 would be that it represents an isolated Cretaceous 
island which, in the general elevation of the central ridge, was cut off 
from the lateral areas and subjected to more or less profound alteration 
as the character of the rock and plant remains suggests. 
While writing these conclusions, a very interesting fact bearing 
upon the general correlation of the Cretaceous beds has been brought 
to my notice by Dr. A. W. G. Wilson, of McGill University, who asked 
me to determine a specimen of fern collected during the past summer. 
The specimen was a portion of a large slab, which it was impossible 
to transport from its original location. It was obtained from the 
Crow’s Nest Coal Basin, about thirty miles north of Michel Station, 
B.C., and it therefore belongs to the same deposits as previously reported 
upon by me. It, however, adds in most important ways to our know- 
ledge of the very scanty flora hitherto obtained from these beds, since 
it proved to be a specimen of Aspidium dunkeri, Schimp., which has 
hitherto been known as an element of the Potomac flora, in which series 
it constitutes one of the best known and most widely distributed forms 
(19: p. 101). On this basis it is now possible to correlate the Crow’s 
Nest Coal Basin with the Shasta series, and the same may also be said 
of the deposits on the Nordenskiold river, from which a limited flora 
has been obtained and studied. 
