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  Vol. 
  12 
  July 
  19, 
  1922 
  No. 
  13 
  

  

  JOURNAL 
  

  

  OP 
  THE 
  

  

  WASHINGTON 
  ACADEMY 
  

   OF 
  SCIENCES 
  

  

  BOARD 
  OF 
  EDITORS 
  

  

  S. 
  F. 
  Bl,AKB 
  "^IDNBY 
  PaIOB 
  E. 
  D. 
  WnXIAUSON 
  

  

  bursao 
  or 
  puiirr 
  ian>nmy 
  osobooicAi. 
  subwv 
  osopBysiCAL 
  labobatokt 
  

  

  ASSOCIATE 
  EDITORS 
  

  

  H. 
  V. 
  Hakjuan 
  S. 
  a. 
  Robwbs 
  

  

  BOTAVICAt, 
  SOCntTT 
  ENTOMOLOGICAL 
  SOCIBTV 
  

  

  N. 
  HOLUSTBB 
  G. 
  W 
  Stosb 
  

  

  UOIXtOICAl, 
  lOCIBTT 
  GBOLOGICAL 
  SOCISTy 
  

  

  W. 
  F. 
  M90G8K3 
  J. 
  R. 
  SWAMTOM 
  

  

  rrnXLOBOtBlCAM, 
  ■OCIVTT 
  ANTHROPOLOGICAL 
  SOCIBTV 
  

  

  PUBLISBBD 
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   KCCBPT 
  IN 
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  MONTHLY 
  

  

  BY 
  THI 
  

  

  WASHINGTON 
  ACADEMY 
  OP 
  SCIENCES 
  

  

  OFnCB 
  OP 
  PUBUCATION 
  

  

  311 
  CHURCH 
  STREET 
  

   BA3TON, 
  PA 
  

  

  Entered 
  us 
  Second 
  Class 
  Matter, 
  January 
  25, 
  1919, 
  at 
  the 
  post-office 
  at 
  Easton, 
  Pa., 
  under 
  the 
  

   Act 
  of 
  August 
  24, 
  1912. 
  Acceptani-e 
  for 
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  special 
  rate 
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  provided 
  for 
  

   in 
  Section 
  1103, 
  Act 
  of 
  October 
  3, 
  1917. 
  Authorized 
  on 
  July 
  3, 
  1918. 
  

  

  