APPENDIX. 



^—COMPARATIVE VIEW OF THE SUCCESSIVE PALAEO- 

 ZOIC FLORAS OF NORTHEASTERN AMERICA AND 

 GREAT BRITAIN. 



In eastern Canada there is a very complete series of fossil plants, 

 extending from the Silurian to the Permian, and intermediate in its 

 species between the floras of interior America and of Europe. I may 

 use this succession, mainly worked out by myself,* to summarise the 

 various Palaeozoic floras and sub-floras, in order to give a condensed 

 view of this portion of the history of the vegetable kingdom, and to 

 direct attention to the important fact, too often overlooked, that 

 there is a definite succession of fossil plants as well as of animals, 

 and that this is important as a means of determining geological 

 horizons. A British list for comparison has been kindly prepared 

 for me by Mr. R. Kidston, F. Gr. S. For lists referring to the west- 

 ern and southern portions of America, I may refer to the reports of 

 Lesquereux and Fontaine and White, f 



In this connection I am reminded, by an excellent little paper of 

 M. Zeiller, % on Carboniferous plants from the region of the Zambesi, 

 in Africa, that the flora which in the Carboniferous period extended 

 over the temperate portions of the northern hemisphere and far into 

 the arctic, also passed across the equator and prevailed in the south- 

 ern hemisphere. Of eleven species brought from the Zambesi by M. 

 Lapierre and examined by M. Zeiller, all were identical with Euro- 



* " Acadian Geology," " Reports on Fossil Plants of Canada," Geo- 

 logical Survey of Canada. 



f " Geological Surveys of Pennsylvania, Ohio, and Illinois." 

 % Paris, 1883. 



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