94 ROYAL SOCIETY OF CANADA 
Chase County, and from the Cretaceous of various localities in Kansas, 
as collected by, Prof. Prosser in 1897 and described by me (12) in 
1900. This resemblance was so very close as to lead me to the belief 
that the two collections must be of the same age, and I at once began 
the search for evidence which would sustain this idea; but I very soon 
discovered that in spite of their superficial resemblance, which was only 
an accident of their preservation, there was no connection between them, 
either geologically or structurally. 
In 1903 I gave an account of certain woods from the Lignite 
Tertiary of Canada (18). Among these were species of Cupressoxylon, 
Sequoia and Rhamnacinium, and our studies of the Texas materiai 
shows a contemporaneous flora which, if not co-extensive with that of 
the more northern region, was at least very similar and in some respects 
very closely related, or even identical. 
In 1902 I described a wood from the Miocene of the Horsefly 
River in British Columbia (14)— a wood which I had reason to suppose 
might represent Sequoia langsdorfii. The leaves of this species are 
well known and widely distributed in great abundance throughout the 
Lower Tertiary of Saskatchewan, Alberta, British Columbia and Van- 
couver Island, and the constant association of the wood in question 
with these leaves, and often with no other species, led me to consider 
the provisional association of the two under the same specific name to 
be justifiable. In 1903, various woods from the Lignite Tertiary of 
Porcupine Creek and Great Valley, Saskatchewan, proved to include 
further representations of the same species (13, 44), but in a more per- 
fectly preserved condition, and it thus became possible to recast the 
original diagnosis. In the material from Texas, this species once more 
appears and in such a state of preservation as to permit of a further 
elaboration of the diagnosis characters. The description of the wood 
of this species may, therefore, be recast as follows :— 
SEQUOIA LANGSDORFII (Brongn.), Heer. 
Cretaceous of Nanaimo, Vancouver Island and Port McNeill, B.C. 
Eocene of Alaska; of the Great Valley and Porcupine Creek Groups, Sask- 
atchewan; Fort Union Group; Yegua Clays of Somerville, Texas. 
Miocene of John Day Valley, Oregon; Mackenzie River, N.W.T., and Horsefly 
River, B.C.; Green River Group, Colorado. 
Bib.:—Dawson, Trans. R. C. (Canada), XI, iv, 56, 1895; Dawson, B. N. A. 
Bound. Comm. App. A., 331, 1875; Penhallow, Trans. R. S. (Canada), 
VIII, iv, 44, 68, 1902, and IX, iv, 41, 1903. 
Transverse.—Growth rings prominent, very unequal, medium to narrow. Sum- 
mer wood prominent but thin, of 3—6 rows of thick-walled tracheids 
with bordered pits on the tangential walls; transition from spring 
