AGE OF THE LIGNITIO DETERMINED BY ITS FLORA. 347 



Tlio sjiecies described in tlic same report from the lower stage of (lie 

 Lignitic of Canada are fewer, and apparently represented hy more imperfect 

 specimens. They arc: — 



Eqiiisetum PailatorU, H., of the Miocene of Europe, a species to which 

 E. Hnijdcnii of Carbon is closely allied. Its hal)itat is marked as Great 

 Valley. 



Letiina scutata, sp. nov., abundant at the Bad Lands, and also at Point 

 of Rocks. 



Scirpus species, Bad Lands. 



Salix Rheana?,!!. (Great Valley), .species of the Miocene of Greenland. 



Sapindus offinis (Bad Lands), species of the Union group. 



Rha7unus, an undescribed species (Great Valley), corresponding to Mio- 

 cene species of Europe and of the American Lignitic. 



yEsculus antiquiis, Trapa borcalls, and a CarpolUlies, three new species 

 described from obscure specimens from the same locality as that of Lemna, 

 the Bad Lands, west of Woody Mountain. These last plants represent a 

 lower geological division, which could not be recognized from the limited 

 number of species pertaining to it. But from tiie exposition as it is made 

 by Prof. Dawson, it is clear that he had to refer the fossil plants of the 

 Canadian Lignitic to the Tertiary, and consequently the formations also; for, 

 indeed, this flora, as remarked already, has not any vegetable remains which, 

 by comparison, could be recognized as identical or even related to any Cre- 

 taceous species. 



Coming back to the other plants of Point of Rocks, for considering their 

 characters as an evidence of their age, by comparison with otiier groups of 

 floras than that of Canada, we find in the table lour of them marked as 

 analogous to Cretaceous types. Tlie fir;st, P/stia corrugata, has merely a 

 generic relation to Pistia Mazelii, Sap. (ined.), lately found in the fresh-water 

 Upper Cretaceous of Fuveau, France. From the sketch kindly communi- 

 cated by the author, his species is very different in characters from that of 

 Point of Rocks, and therefore it merely evinces the possibility of a relation 

 between the age of the formations. The generic affinity, however, is worth 

 remarking, as it records the first appearance of the genus by two species which 

 represent it, one only on each continent. 



By the same degree of affinity, I have marked, in the Cretaceous column 

 of the table, Sequoia longifoiin, also found at Black Buttcs, and Sequoia 



