346 * EE. J. Pictet on the Diluvian Period. 
it. I therefore think it necessary at this time to furnish new 
— and to set forth more clearly those evidences which have 
ecided my own mind, and which I have no doubt will convince 
the most incredulous. 
This question may be considered from two points of view, the 
geological and the paleontological. I shall only approach the 
question in the latter aspect, for which my studies have better 
fitted me, but I ought to remark that we have no example of seri- 
ous disagreement between paleontology and geology when they 
are employed to distinguish the several periods of the history of 
the globe. There is no one of these periods which is not clearly 
distinguished by the character of its fauna, and no case can be 
cited where stratigraphy has required a division which palzeon- 
tology has not confirmed. If we survey the whole series we 
never find any two consecutive stages in which the zoological 
population has been identical. 
f this is so, the geologists and the palseontologists will be 
unanimous for uniting these two epochs into one, and for apply- 
ing to them acommon name. I think if I am able to prove, 
from the standpoint of palzeontology, that the two periods are 
only one, this result ought to be as fully admitted as in anala- 
us cases for anterior e ; : 
I know that this opinion is not without question, and that some 
geologists, whose learning and judgment I highly respect, think 
that in the condition of the globe and the forces which have 
deposits, following the glacial period, which certainly neither 
commenced nor ends suddenly, will give them very great diffi- 
culties, 
My object in this communication is simply to demonstrate that 
between the Diluvian period and the modern epoch there has not 
been any modification of the fauna having the least relation to 
the changes which characterize and distinguish other palzonto- 
logical faune. For this purpose I shall consider two disti 
ints, all demonstrate first that al/ actual or modern faunz 
ave existed from the origin of the Diluvian period. I shall 
EK ee 
