﻿•?;; 
  

  

  Vol. 
  12 
  

  

  January 
  19, 
  1922 
  

  

  No. 
  2 
  

  

  JOURNAL 
  

  

  OP 
  THB 
  

  

  WASHINGTON 
  ACADEMY 
  

  

  OF 
  SCIENCES 
  

  

  V 
  

  

  S. 
  F. 
  BlakB 
  

  

  BURSAU 
  OP 
  rhAur 
  inodstbt 
  

  

  BOARD 
  OF 
  EDITORS 
  

  

  Sidney 
  Paigb 
  

  

  OSOLOOICAI. 
  8USV87 
  

  

  E. 
  D. 
  Williamson 
  

  

  OSOFBTSICAI. 
  I^BORATORY 
  

  

  ASSOCIATE 
  EDITORS 
  

  

  H. 
  V. 
  Harlan 
  

  

  BOTANICAL 
  SOCISTY 
  

  

  N. 
  HOLUSTSK 
  

  

  BIOLpOICAI, 
  30aHTV 
  

  

  W. 
  F. 
  Meggers 
  

  

  PHtLOaoPBICAL 
  ■OCIBTV 
  

  

  S. 
  A. 
  ROHWBR 
  

  

  ■MTOMOLOOICAL 
  SOCnTI 
  

  

  G. 
  W. 
  Stosb 
  

  

  OSOLOOICAI. 
  SOCISTT 
  

  

  J. 
  R. 
  SWANTON 
  

  

  AMTHBOPOLOOICAL 
  BOCUITy 
  

  

  PUBUSBBD 
  SBMI-MONTHLT 
  

   EXCEPT 
  IN 
  JT7LT. 
  AUGUST, 
  AND 
  SEPTEMBER, 
  WHEN 
  MONTHLY 
  

  

  BT 
  THB 
  

  

  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  

  

  OPFICB 
  OF 
  PUBLICATION 
  

  

  211 
  CHtTRCH 
  STREET 
  

  

  BASTON, 
  PA. 
  

  

  Bntertd 
  u 
  Second 
  Class 
  Matter, 
  Janauy 
  25, 
  1919, 
  at 
  the 
  poat-office 
  at 
  BMton, 
  Pa., 
  nader 
  tiM 
  

  

  Act 
  of 
  August 
  24, 
  1912. 
  Acceptance 
  for 
  mailing 
  at 
  special 
  rate 
  of 
  postage 
  prOTidcd 
  far 
  

  

  in 
  .Section 
  1103, 
  Act 
  of 
  October 
  3, 
  1917. 
  Aatborised 
  on 
  Jolr 
  3. 
  1918. 
  

  

  