LATKR CRETACBOtrs AND KAIXOZOIG. 



207 



of a woodland streamlet, and have fonnd tfaem stored with 

 the fallen leaves of trees, but it was in Tain to search for 

 the leaves of herbaceous plants. 



The rJimate of North America and Eniope, represented 

 by the Cenomanian Tegetation, is not tropical bnt warm 

 temperate ; bnt the flora was more uniform than at pres- 

 ent, indicating a very equable climate and the possibility 

 of temperate genera existing within the Arctic circle, and 

 it would seem to have become warmer toward the close of 

 the period. 



The flora of the Cenomanian is separated in most 

 countries from that of the Senonian, or uppermost Cre- 

 taceous, by a marine formation holding few plants. This 

 depends on great movements of elevation and depression, 

 to which we must refer in the sequel. In a few regions, 

 however, as in the vicinity of the Peace Biver in Canada, 

 there are plant-b^uring beds which serve to bridge over 

 the interval between the 

 Early Cenomanian and 

 tiie later Cretaceous.* 



To this interval also 

 would seem to belong 

 the Belly River series of 

 west«m Canada, which 

 contains important beds 

 of coal, but is closely as- 

 sociated with the marine 

 Fort Kerre series. A 

 very curious herbaceous 



plant of this group, which I have named Brasenia an- 

 tiqua^ occurs in the beds associated with one of the coals. 

 It is a close ally of the modem B. peUata, an aquatic 

 plant which occnrs in British Columbia and in eastern 



Fie. 76. — Bntenia anUftia. Vjuper Cre- 

 t»c«ous. South Saskatdnirmn fiirbr. 

 Katural sixe. a, 6, Diagrams of vena- 

 fion, sli^tly eiduged. 



* See paper by die aothor in the " TransacticHis of the Kojal Sodety 

 of Canada," 1882. 



