EDITORIAL ANNOUNCEMENT 



The next number will complete volume 4 of the Behavior Mono- 

 graph Series. Hereafter the series will appear under the title COM- 

 PARATIVE PSYCHOLOGY MONOGRAPHS. The new series will 

 be under the editorship of Professor Walter S. Hunter of the Univer- 

 sity of Kansas, with the co-operation of Professor H. A. Carr of the 

 University of Chicago, Professor S. J. Holmes of the University of 

 CaHfornia, Professor K. S. Lashley of the University of Minnesota, 

 and Dr. Robert M. Yerkes of the National Research Council. 



Manuscripts may be sent to Professor Hunter at Lawrence, Kansas, 

 or to any other member of the editorial board. 



The new monograph series will be broader in scope than the old 

 one and, in addition to studies in animal behavior, will publish work 

 in human psychology conducted from the comparative point of view. 



Comparative Psychology Monographs 



Volume 1 



1. Studies of the reliability of the problem-box and the maze. By 

 W. T. Heron and W. S. Hunter. 



Price per volume of 500 pages, net postpaid, $5.00, United States; $5.25, 

 Canada; $5.50, other countries. 



Published by 

 WILLIAMS & WILKINS COMPANY 



Mt. Royal and Guilford Avenues 

 Baltimore, U. S. A. 



