40 



satisfactory manner, and it was possible to refer them to Betula maerophylla without hesi- 

 tation. Together with the leaves there were also a number of cones of birch which, from 

 their intimate association with the leaves, were believed to be of the same species. The 

 largest measured 28 mm, long and S mm, wide. It is quite probable that some of the 

 cones previously discussed may belong here. 



The only other record of this species for Canadian localities is to be found in Heer's 

 report upon the plants collected by Sir John Richardson in the Mackenzie River basin in 1856. 

 No record is to be found for localities in the United States, from which it may be inferred 

 that this primarily European type is found in America only in somewhat high latitudes. 



Betula prisea f Ett. 



Bib: Geol. Surv. Can., 1875-76: U. S. Geol. Surv., Bull. 37, 1887, 31, pi. XIV., f. 2: Fl. 

 Foss. Alask. 28, pi. V. f. 3-6. 



Specimens of a birch derived from the Quesnel river in 1874 were regarded by Sir 

 "William Dawson as possibly belonging to Betula ■prisea, Ett. This species has been recorded 

 by Ward as occurring in the Fort Union group at Seven-mile creek, Montana, while Heer 

 has noted it in the Eocene of Alaska at Port Graham and Neniltschik. 



Betula stevensoni, Lesq. 



Bib : Trans. R.S.C., VIII, 1890, iv, 89, f. 30 : Ter. Fl. VII, 138 : Cat. Cret. and Tert. pi. 48 : 

 Geol. Surv. Can., 1877-78, 186 B : Trans. R.S.O., VIII, 1902, iv, 68. 



Very fragmentary leaves from the Similkameen river, found in Lambe's collection 

 -of in06, are undoubtedly the same as the imperfect specimens figured by Sir "William Dawson 

 in 1890, and also derived from the same locality. These specimens were recognized as B. 

 geopperti, the original description of which by Lesquereux was based upon specimens from 

 Evanston, "Wyoming. More recently B. goepperti has been found by Knowlton to be iden- 

 tical with B. stevensoni, Lesq., and it has been so transferred. It is therefore possible to extend 

 the range of this species by including specimens from Nine-mile creek, Similkameen 

 river, described by Sir Willianl Dawson in 1877, and from the Horsefly river as described by 

 Penhallow in 1902. 



Callistemophyllum latum, Dn, 



Bib : Geol. Surv. Can., 1888-89 : Trans., R.S.C., VII, 1889 : Flor. Dak. Gr. 138. 



There is only one record of the occurrence of a leaf which Sir "William Dawson referred 

 to the above genus and species, although with some hesitation. The specimen was derived 

 from the Tertiary of the Mackenzie River basin, a formation generally regarded as of Miocene 

 age. It may be noted in this connexion that the only other record of the genus in America 

 is contained in Lesquereux's recognition of C. heerii, Ett., in the Dakota group of Kansas. 



Carex burrardiana, Dn. 

 Bib : Trans. R. S. C, I, 1895. 137-161. 



The only example of this species is to be found in a collection from Burrard inlet 

 described by Sir "William Dawson in 1895. The specimen consists of a spike which has been 

 compressed longitudinally so that, looking from above, it presents the aspect of a whorl 

 of bracts. 



