452 



Tllh: ami: UK \\ XATCHALIST [Vol. XLI 



to Gray ('80, II, 147) tlie two species now occupy an unstable 

 position of such character that "a Httle further drying of the 

 climate would precipitate their doom." 



The evidence aflonh^d U^ i!ie PNm.kh ciu dn. ..f Tnumio is 

 therefore in accord, in tins respect, with that tuniished hv certain 

 Pleistocene deposits at Khmra, Ni'w ^ork, and hv the concltisions 

 elsewhere stated with resi)ect to the recession of hequoia, Taxo- 

 diinn, and probably also Pseudotsuga, from the present (rreat 

 Plains region of Saskatchewan and Alberta ('04, 04-05). 



McChLL UxivEKsrrv 



MONTHKAL 



•02. Sih-a of North America. Ill & IX. 1902. 



