Professor T. D. A. COCKERELL, 
BOULDER, 
COLORADO, U. S. A. 
BIOGRAPHICAL DIRECTORY OF LIVING ZOOLOGISTS 
Edited by Professors J. McKEEN CATTELL and T. D. A. COCKERELL 
The editors will be under great obligations to those zoologists who will fill in 
the enclosed blank. The Science Press, Sub-station 84, New York City, will publish 
as soon as the compilation can be made a Biographical Directory of Living Zoolo¬ 
gists throughout the world, similar in general plan to the work on American Men 
of Science, of which an announcement is enclosed. The blank should be returned to 
Professor T. D. A. Cockerell, Boulder, Colorado, U. S. A. 
