Vol. 1. No. 9. 



December 4, 1911. 



JOUENAL 



OF THE 



WASHINGTON- ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 George K. Burgess Barton W. Evermann Frederick Leslie Ransome 



BUREAU OF STANDARDS BUREAU OF FISHERIES GEOLOGICAL SURVEY 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST AND SEPTEMBER, WHEN MONTHLY, 



BT THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 

 THE WAVERLY PRESS , 

 BALTIMORE, MD. 



