Vol. VI No, 5 



March 4, 1916 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 William R. Maxon Edson S. Bastin N. Ernest Dobsbt 



RATIONAL vrCSEUM GEOLOGICAL BORVET BUBSAU OT 9TAXDABM 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER. WHEN MONTHLY 



BT THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



WILLIAMS & WILKINS CO. 



BALTIMORE, MD. 



Entered a3 second-claas matter July 14, 1911, at the post office at Baltimore, Maryland, under the Aot of 



July 16. 1894 



