42 
ANNALS NEW YORK ACADEMY OF SCIENCES 
two years only and be eligible to reappointment or substitution of new 
members in 1910. The committee shall have power to extend its 
membership so as to secure American and international cooperation.” 
Pursuant to the terms of the above resolution, Messrs. C. D. Walcott, 
H. F. Osborn, W. H. Dali and W. B. Scott were appointed as a committee 
on Cooperative Research in Paleontologic Correlation, with power to add 
to their number. The object of the committee was to obtain through co¬ 
operative research by European and American paleontologists a better and 
more exact correlation of geological horizons. The method of procedure 
was left to the discretion of the committee. 
The committee found it advisable at the outset to divide into two sec¬ 
tions, on vertebrate and invertebrate paleontology respectively. Dr. Osborn 
was made chairman of the vertebrate, Dr. Walcott of the invertebrate section. 
Dr. T. W. Stanton was invited to accept the secretaryship of the invertebrate 
and Dr. W. D. Matthew of the vertebrate section. 
The following paleontologists were invited to become members of the 
committee and have signified their acceptance. 
Professor Louis Dollo of the Royal Museum of Natural History, Brussels, 
Belgium, 
Professor Charles Deperet of the University of Lyons, France, 
Professor Eberhard Fraas of the Stuttgart Museum, Germany, 
Professor Ernst Koken of the University of Tubingen, Germany, 
Dr. F. von Huene of the University of Tubingen, Germany, 
Professor S. W. Williston of the University of Chicago. 
Other members may be added as the work progresses, and invitations will 
be extended to various other paleontologists to assist in special parts of 
the work. Prof. J. C. Merriam, of the University of California, has kindly 
agreed to assist in the correlation especially of the California and Sierra 
Nevada sections. 
It is intended to distribute the correlation of the different geological 
periods in Europe and America among the several members of the com¬ 
mittee, their evidence and conclusions to be reviewed and the broader and 
final correlation made by the committee as a whole. 
II. Method of Procedure. 
It is desirable in the first place to get the data together and point out the 
weight and bearing of the evidence. This may best be done by means of 
annotated lists of typical faunae. These may be drawn up, reviewed, revised 
