288 GEOLOGICAL SURVEY OF THE TERRITORIES. 



The extraordinary separation of both floras has been sufficiently estab- 

 lished by former comparison and descriptions of species. In the upper 

 stage some rare types of the Cretaceous re-appear. But apparently 

 the specimens obtained by the survey mostly represented the upper 

 stage of the Canadian Lignitic. For Professor Dawson describes and 

 enumerates, from Porcupine Creek, seventeen species, all of Miocene 

 type, and most of them formerly described by Professor Heer and 

 Professor Newberry, from the Miocene formations of Alaska, Greenland, 

 and especially from the Union group, with which the Porcupine Creek 

 group appears closely allied. These plants are : 



Equisetum species, similar to E. arcticum Heer. 

 Glyptostrobus Europeus, Heer. 

 Sequoia Laugsdorfii Brgt. 

 Thuia interrupta Newby. 

 Phragmites? species. 

 Scirpus species. 

 Populus Bichardsoni Heer. 

 Cory 1 us rostrata Ait. 

 Corylus American. Walta. 

 Diospyros species. 

 Bhamnus coucinnus, Newby. 

 Carya antiquorum, Newby. 

 . Juglans cinerea 1 ? or J. biiinica, Ung. 

 Viburnum pubescens, Pursh. 



To this and by comparison are added the species catalogued by Heer, 

 from Bichardson's collection on the Mackenzie, which, says Professor 

 Dawson, belongs to the same region. They are : 



1. Glyptostrobus Europseus Heer. 



2. Sequoia Langsdorfii Brgt. 



3. Pinus species. 



4. Smilax Franklini. 



5. Populus Bichardsoni. 



6. Populus arctica. 



7. Populus Hookeri. 



8. Salix Bheana. 



9. Betula species. 



10. Corylus Macquarrii. 



11. Quercus Olafseni. 



12. Platanus aceroides. 



13. Hedera McClurii. 



14. Pterospermites dentatus. 



15. Phyllites aroideus. 



16. Antholithes amissus. 



17. Carpolithes seminulum. 



The species described in the same report from the lower stage of the 

 Lignitic of Canada are fewer and apparently represented by more im- 

 perfect specimens. They are Equisetum Parlatorii, Heer, of the Miocene 

 of Europe, a species to which E. Eaydenii of Carbon is closely allied. 

 Its habitat is marked as Great Valley. 



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

 of Bocks. 



Scirpus species, Bad Lands. 



Salix Rheana ? Heer (Great Valley), species of the Miocene of Green- 

 land. 



