Vol. V No. 9 



May 4, 1915 



JOUENAL 



OP THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Feed E. Wright William R. Maxon Edson S, Bastin 



QBOPHY8ICAL I^BOBATOBY NATIONAL MUSEUM QIOLOQICAL BUBVIT 



PUBLISHED SEMI-MONTHLl 

 EXCEPT IN JULY. AUGUST. AND SEPTEMBER, WHEN MONTHLY. 



BT TBB I 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OP PUBLICATION 



THE WAVERLY PRESS 

 BALTIMORE^ MD. 



