426 THE CRETACEOUS AND TERTIARY GEOLOGY 



here which do not relate directly to the mesozoic or tertiary geology of Brazil. There 

 are besides many valuable works upon the geology of the River Plate basin, the west 

 coast and north-eastern South America, by such writers as Darwin, D'Orbigny, Bur- 

 meister, Castelnau, Humboldt and Spix and Martins, to which one naturally turns for 

 trustworthy information in studying the geology of the continent. With the excep- 

 tion of the publications of Spix and Martins, which the writer has been unable to 

 consult carefully, the most pertinent of these works are referred to, the others are 

 omitted. The titles given under the preceding head must, of course, be added to 

 this list. 



Agassiz, Louis.^Edioburgh New Philosophical Journal for January, 1841. Description of the Fossil Fishes Collected 

 by George Gardner in the Province of Ceaiii, by Louis Agassiz. 



Prof. Agassiz referred the beds from which they were taken to the cretaceous. 



Agassiz. Louis. — Tlie Atlantic Monthly (Boston, Mass.) for July and August, 1866. Physical History of the "Valley 

 of the Amazon, by Louis Agassiz. 



In this article the author expresses the opinion that Ceara and the region north 

 of that province belong geologically to the Amazon Valley region, describes briefly its 

 tertiary deposits, and refers them " to the ice period in its earlier or later phases." 



To explain its aqueous origin, he postulates a gigantic terminal moraine closing 

 the valley at its eastern end, behind which these beds are supposed to have been de- 

 posited in cold fi'esh water. 



Agassiz, Prof. Lodis. — Geological Sketches, by Louis Agassiz. Boston, 1886, Vol. II, p. 153 et seq. 



The chapter on the "Physical History of the Valley of the Amazons" is the 

 same as that published under this title in the Atlantic Montlily for July and August, 

 18(50. . 



Agassiz, Louis and Ma.ior Joao Martins da Silva Cootinho. — Sur la Gdologie de I'Amazone, par MM. Agassiz 

 et Coutinbo, Paris, E. Biot, 1867, 8. E.\trait du Bulletin de la Socieie Geographique de France. 



Sub.stantially the same views are here given as are published in the Atlantic 

 Monthly article rcfeiTcd to above. 



Agassiz, Phof., and Mrs. Louis. — A Journey in Brazil, by Prof, and Mrs. Louis Agassiz, Boston, 1868. 



On pp. 146-7, are remarks by Prof Agassiz upon the so-called glacial drift at 

 Bahia, Pernambuco, Maceio, Parahyba and Para. He refers to the fossils found at 

 Parahyba do Korte, and he discusses the so-called drift phenomena of the Amazon 

 Valley region. The clays and "sands i-eferred to here as glacial drift are tertiary, and 

 the watei"-worn material found at the places referred to is the " wash," or concentrated 

 coarse material left scattered over the region, as the laud rose from beneath the ocean 

 at the close of the tertiary. 



