590 TROCEEDINGS OF BOSTON MEETING. 



Following out the argument suggested by Newberry and Dawson, that is, the 

 relation existing between the j^lants of Alaska and Mackenzie river, and these in 

 turn with the Canadian Laramie and the Fort Union group, -we have important 

 confirmatory evidence. The flora of the Mackenzie river beds, as worked out by 

 Heer,^ Schroeter,t and Dawson,J now numbers 30 species, and of these no less 

 than 12, or 40 per cent, are found in Alaska. The 12 species common to Alaska 

 are not rare or poorly defined in the Alaskan flora, but are in the main well marked 

 and readily determinable forms, most of which are very abundant in individuals, 

 as for example Sequoia langsdorfil, Taxodium dlsiicJium miocenum, Ghjptostrohus eu- 

 ropxus or ungeri, Corylus macquarrii, Populus arctica, etc. A single species, Pteris 

 sitkensis, is confined to these two localities, and a number of other species, though 

 known by diiierent names, are closely allied, if not identical. There can be, 

 therefore, little doubt as to 'the close relationship between the Alaska and the 

 Mackenzie river deposits. 



The Mackenzie river flora, as already suggested, is in like manner closely related 

 with the Canadian upper Laramie, or Fort Union group, as it is called in the United 

 States, about 30 per cent of the Mackenzie species being common to the two. 



On further working out the distribution, we find that 16 of the 55 Alaskan spe- 

 cies are found in the Fort Union of the United States. By combining the species 

 common to Mackenzie river, Canadian upper Laramie, and Fort Union, we have 

 22 or 23 of these species also found in the Alaskan beds. 



Without going further into the subject, which indeed the present state of our 

 knowledge will hardly w^arrant, it is safe to say with Sir William Dawson that 

 "There can scarcely be any doubt that the flora of the upper Laramie, of the 

 Atanekerdluk series in Greenland, and of the Spitzbergen and Alaska Tertiaries 

 corresponds with the Eocene of Europe, and is also identical with Fort Union flora 

 of the Missouri region, formerly regarded as Miocene." 



A less extended abstract of this paper is published in The American 

 Journal of Science, volume xlvii, page 137. 



A brief paper by the President was then presented : 



NE W DISCO VERIES OF CA RB ONIFER OUS BA TRA CHI A NS 

 BY SIR J. WILLIAM DAWSON 



The paper is published in the Canadian Record of Science, January, 

 1894. 



The following paper was read by J. Stanley-Brown : 



CENOZOIC GEOLOGY ALONG THE APALACHICOLA RIVER 

 BY W^ILLIAM H. DALL AND JOSEPH STANLEY-BROWN 



This paper is printed as pages 147-170 of this volume. 

 A recess was then taken until 2 o'clock p m. 



*F1. Foss- Arct., vol. vi, 1 Abth., 3d nr.; Beitnlge zur Miocene Fl. v. Nord-Canada. 



^ Ibid, vol. VI, 1 Abth., 4th nr. ; Untersuehung ii. foss. Holzer d. Arct. zone. 



f Trans. Roy. Soc. Canada, 18.S9; Fossil Plants from Mackenzie and Bow Rivers. 



