REVIEWS 579 



i. The Bahia basin, formerly referred to the Cretaceous, is prob- 

 ably either Eocene Tertiary, or Laramie. 



2. The parti-colored beds along the coast, formerly referred pro- 

 visionally to the Tertiary, are the same as the Bahia Eocene. 



3. The sediments of the Alagoas section are of fresh-water origin, 

 like those of Bahia. 



4. No fossils have been found in the section along the Bahia and 

 Minas Railway, but it seems probable that these beds are the south- 

 ward continuation of the Bahia beds. 



The crystalline series next back of the sedimentary beds consist 

 mainly of quartz-mon'zonites (gabbros) granites and gneisses, the first 

 having a notable development. The Bahia-Minas section ends in 

 mica and other schists much faulted, wrinkled, and cut by veins, and 

 much more deeply decomposed than the quartz-monzonites. 



The contribution is doubly valuable in that it bears on the evolu- 

 tion of a continent that has played a peculiar and interesting part in 

 geologic history, but which is as yet too little known to be interpreted 

 with precision or satisfaction. The generosity of Agassiz, as well as 

 the devotion of Branner, in securing it are to be gratefully recog- 

 nized. 



T. C. C. 



Progress of Geological Work in Canada During i8qq. By Henry 

 M. Ami, Can. Rec. of Sci., Vol. VIII, No. 4, July 1899. 

 Contrary to the natural interpretation of the title this is a list of 

 works relating to Canadian geology published during the year 1899 

 through various avenues, and embracing private as well as official 

 works. It will be found helpful to working geologists. 



C. 



Descriptive Catalogue of a Collection of the Economic Minerals of 

 Canada, Paris Internatio?ial Exhibition, igoo. 



This is somewhat more than a simple descriptive catalogue of the 

 minerals exhibited, as it contains notes relative to the modes of their 

 occurrence and to the industrial operations connected with them, 

 when these are important, as well as other incidental information 

 which gives the catalogue value as a book of reference. 



