34 Sm J. W. DAWSON ON FOSSIL "WOODS FEOM 



III. — Upper Laramie Series, 

 Conifers. 



Sequoia.— Type of S. gigantea. Wood End Depot (a.M.D.) ; Coteau, in drift (G.M.D.) ; 

 Mackenzie River (G-eol. Survey) ; two specimens. 



Sequoia. — Type of S. sempervirens. Turtle Mountain (G-.M.D.) ; Lignite, Souris Valley 

 (G.M.D.) ; Middle Lignite, 245 Mile Valley (a.M.D.) ; Lignite, Wood End Depot (G.M.D.) ; 

 Mackenzie Eiver (Geol. Survey); thick bed of Lignite, Edmonton (G.M.D.) 



Taxites. — Type of S. baccata. Eed Deer River (J. McKenzie), in Redpath Museum ; 

 Wood End Depot (Q.M.D.) 



Ginkgo. — With short medullary rays as above, under Section I. Souris RiA^er four 

 miles vpest of St. Mary's River (G.M.D.); Mackenzie RiA^er (Geol. Survey). 



Thuja.— 400 Mile Point, 49th parallel (G. M. D.) ; L. 29, R. 13 W. (J. B. T.) ; Middle 

 Fork, Oldman River (J. B. T.) 



PiNUS (?) — Some drift specimens in the collections of Dr. G. M. Daw^son shew structures 

 resembling those of P. Banksiana, the scrub pine. Leaves referabl e to a pine of this type, 

 occur in the Mackenzie River beds, according to Heer. 



Exogens. 



These are specimens (T.C.W.) from Souris River, shewing the structure of Juglans, 

 and from the same place (T.C.W.), having the structure of Belula. 



In a series of specimens from Swift Current (T.C.W. ), which I suppose belong to the 

 Laramie horizon, there are structures resembling those of Juglans, Populus, Acer and Betula. 



It is to be observed that, in addition to the specimens of silicified wood, shewing the 

 structure of Sequoia, similar structures occur in specimens of the lignites, when treated 

 with caustic potash or with nitric acid, and that leaves and cones of Sequoia, both of the 

 gigantea and sempervirens types, are among the common fossils of the shales and sand- 

 stones. The occurrence of taxine woods in like manner, connects itself with the leaves 

 and branches of Taxites Olriki, Heer, and T. occidentalis, Newby, and with nuts and leaves 

 of Ginkgo, and that of Tiiuja with the plentiful remains of T. interrupta, Newby. In like 

 manner, the exogenous woods represent several of the genera whose leaves are common in 

 the clays and shales. 



IV. — Additional Laramie and Belly River Plants. 



Since the publication of my paper on the Laramie flora, I have examined an interest- 

 ing collection from the Belly River series, and the Lower and Upper Laramie, made by 

 Mr. J. B. Tyrrell, which includes the following species, either new to our fossil botany or 

 from new localities. 



Onoclea Sensibilis, Lin. — North Saskatchewan, west side, Upper Laramie. 



Sequoia Langsdorffii, Heer. — North Saskatchewan, Rocky Mountain House, Upper 

 Laramie. As stated in my previous paper, I fail in separating the foliage of this species 

 from that of S. Nordenskioldii, Heer, to which I have referred some specimens noticed in that 

 paper. 



