472 THE CANADIAN NATURALIST. [Vol. viii. 



MISCELLANEOUS. 



Supplement to the Second Edition of Acadian Geo- 

 logy, by J. W. Dawson, LL.D., F.R.S. Pp. 102.— This 

 publication contains the new matter added to the 3rd edition of 

 " Acadian Geology " just issued ; and which is published sepa- 

 rately for the benefit of those who already possess the second 

 edition. It reviews the new facts which have been discovered 

 in the Maritime Provinces of British America since the issue 

 of the second edition in 1868. Beginning with the more recent 

 deposits, the author endeavours to vindicate by new facts his 

 conclusion that the cold of the glacial period in Canada was not 

 connected with a continental glacier, but merely with local glaciers 

 on the mountains and ice-drifted by Arctic currents over the sub- 

 merged plains. He subdivides the Post-pliocene deposits as 

 follows in ascending order : — 



(a.) Peaty terrestrial surface anterior to boulder clay. 



(6.) Lower stratified gravels (Syrtensian deposits of Matthew). 



(c.) Boulder clay and unstratified sands with boulders. Fauna, 

 when present, extremely Arctic. 



(d.) Lower Leda clay, with a limited number of highly Arctic 

 shells, such as are now found only in permanently ice- 

 laden seas. 



(c.) Upper Leda clay and sand, or Uddevalla beds, holding 

 many sub- Arctic or boreal shells similar to those of the 

 Labrador coast at present. 



(/.) Saxicava sand and gravel, either non-fossiliferous or with 

 a few littoral shells, of boreal or Acadian types. 



Passing over the Trias, extensively developed in Prince Ed- 

 ward Island, while it affords the remains of some land-plants and 

 one Dinosaurian reptile, and which in Western Nova Scotia is 



