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Vou. 13 April 19, 1923 No. 8 
JOURNAL 
WASHINGTON ACADEMY 
OF SCIENCES 
BOARD OF EDITORS 
SIpNEY PAIGE E. D. WiLuLIaAMson E. P. Kiuprp 
GHOGPHYSICAL LABORATORY NATIONAL MUSEUM 
GEOLOGICAL SURVEY 
ASSOCIATE EDITORS 
H. V. HarLan S. A. RonwEr 
BOTANICAL SOCIETY ENTOMOLOGICAL SOCIETY 
N. Houuister G. W. Stross 
GEOLOGICAL SOCIETY 
BIOLOGICAL SOCIETY 
W. F. Mreaanrs 
PHILOSOPHICAL SOCIETY 
J. R. SWANTON 
ANTHROPOLOGICAL SOCIETY 
PUBLISHED SEMI-MONTHLY 
EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WEEN MONTHLY 
BY THE 
WASHINGTON ACADEMY OF SCIENCES 
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£ntered as Second Class Matter, January 11, 1923, at the post-office at Baltimore, Md., under the 
tage provided for 
Act of August 24, 1912.. Acceptance for mailing at special rate of 
in Beotion 1108, Act of October 8, 1017, Anthorined pe Pan a ibis 
