262 PALEONTOLOGY. 



Dana considers " the glacial theory the most satisfactory, but- 

 the iceberg-theory required, in some cases, for the borders of con- 

 tinents."* 



Sir William Logan, when speaking of the innumerable lakes scat- 

 tered over the Laurentian region of Canada, says, in his * Geology 

 of Canada,' just published, ''The rock which is most characteristic 

 of the depressions is the comparatively soft crystalline limestones of 

 the series ; aud it appears probable that one of the main erosive 

 forces has been glacial action." 



Also, with reference to the great Lake-basins, he says, " These 

 great Lake-basins are depressions, not of geological structure, but 

 of denudation ; and the grooves on the surfaces of the rocks, which 

 descend under the water, appear to point to glacial action as one of 

 the great causes which have produced these depressions."! 



I have great satisfaction in observing that the views which I pub- 

 lished in 1859.| respecting the origin of the great American lakes 

 and other glacial phenomena in North America, are continually 

 receiving additional support irom various sources ; and I venture ta 

 think that it is not unreasonable to suppose that we shall find in 

 North America the pai-allel of that widespread work of ancient 

 glaciers in Europe, which has been so ably described before the- 

 Society by its distinguished President, Professor Ramsay. 



PALEONTOLOGY. 



{Translated from the Comptes Eendns, Feb. 29, 1864.) 



Upon some new Observations of Messrs. Lartet and Christy, relative^ 

 io the existence of Man in the centre of France, at a period 

 when that country was inhabited by the Reindeer and other 

 animals, which do not live there at the present day, 



•i. " ' 



BY M. MILNE EDWARDS. 



The interest whicb surrounds all facts calculated to enlighten ua 

 upon the characteristics of the Gallic Fauna at the period when man 



• Dana's ' Mnmial oi Gcolosry,' ISO:', p. 5115. 



t Geol('f;icnl Survey of Ciinada, 16S3, paw 889. 



% See lltports of ilic Assinnibdiiii! and Saskalclirwan Expedition. In 1855 1 read a paper 

 befoiciheCaiiadiaii In-tiuitc, Toiouto, "On the Ongiu of the Basins of the Great Lakes» 

 advocatii^g the vitw that they had been exiavaled by means of ice. 



