22 



ation of Southern British Columbia. (21,1 86B.) Although the list is not a large one, it 

 embraces several important species not obtained from other localities. 



1. Bctula stevensoni, Heer. 



2. Carpinus grandis, Ung. 



3. Gorytus sp. 



4. Equisetum similkameense, Dn. 



5. Glyptostrohus europceus, (Brongn) Heer. 



6. Juglans sp. Allied to J. rugosa, Heer. 



7. Leguminosites sp. Very like L. arachnoides, Lesq. 



8. Myrica sp. 



9. Nelurnhium sp. Probably N. pygmcKum. Dn. 



10. Platanus sp. 



11. Populus arctica, Heer. 



12. latior, Heer. 



1 3. Sa/pindus sp. Allied to S. angustifolius, Heer. 



14. Sequoia hrevifolia, Heer. 



15. Sequoia lanysiorfii, Heer, 



16. Taxodium distichum miocenum, Heer. 



17. Thuya sp. 



Sir "William Dawson has expressed the opinion that the Similkameen beds are of Miocene 

 age (S2,187B), and this view was adopted by Dr. G. M. Dawson in 1894 {9,75-76B), in the 

 statement that the Similkameen beds are Lower Miocene or Oligocene. He refers to the fact 

 that up to that time, " nearly all the fossils collected from the interior of British Columbia are 

 from localities in the Similkameen valley near the confluence of the Tulameen, all of which 

 are parts of a Tertiary basin not yet traced into connexion with any other, and which may 

 have been originally a distinct lake. It lies nearly fifty miles beyond the southern edge of the 

 Kamloops sheet, and is now included in the drainage basin of the Columbia river." 



" "What has been said with regard to the existence of two well marked horizons in the 

 Kamloops sheet appears to make it probable that the Similkameen beds may correspond in 

 time with one oi the other, and their appearance and mode of occurrence accord best with 

 the hypothesis that they represent the Lower Coldwater : but at the present this is merely a 

 conjecture." The sequence which he gives in connexion with these statements makes his 

 position clear (9,76B). 



Sequence of Tertiary strata of the Similkameen basin. 

 (After Dawson.) 



Feet. 



Early Pliocene — 



Later Miocene including "j 



Tranquille group V 4,100 



Ificola valley, &c j 



Earlier Miocene — 



Lower part of the volcanic series, "| 



Kamloops lake. "Nicola val- V 5,300 



ley. Clear mountains j 



Oligocene. Coldwater group — 



Confluence of the Coldwater and Nicola, 1 



Copper creek K 5,000 



Hatcreek I 



14,400 



