﻿Vol. 
  12 
  May 
  4, 
  1922 
  No. 
  9 
  

  

  JOURNAL 
  

  

  OF 
  THE 
  

  

  WASHINGTON 
  ACADEMY 
  

   OF 
  SCIENCES 
  

  

  BOARD 
  OF 
  EDITORS 
  

   S. 
  F. 
  Blakh 
  Sidnsy 
  Paiob 
  B. 
  D. 
  Whxiamson 
  

  

  BUUAO 
  or 
  rLAMT 
  UrOOITKT 
  OSOUiOICAI. 
  SOBVST 
  OSOFRTSICAI, 
  LABOBATOST 
  

  

  ASSOCIATE 
  EDITORS 
  

  

  H. 
  V. 
  Haioam 
  S. 
  a. 
  Rohwbs 
  

  

  BOTAWICAI. 
  aoCIBTT 
  BNTOMOI<OGICAU 
  SOCIBTV 
  

  

  N. 
  HOLUSTBS 
  G. 
  W. 
  STOS8 
  

  

  BIOLOOICAI, 
  SOCIBT* 
  GBOLOGICAL 
  SOCIBTV 
  

  

  W. 
  p. 
  M4G0BR3 
  J. 
  R. 
  Swantoh 
  

  

  raiLOSorBicAL 
  •ocibty 
  antbropolootcal 
  societv 
  

  

  PTTBUSBBD 
  SSMI-MONTHLT 
  

   8ZCBPT 
  IN 
  JULY, 
  AUGUST. 
  AND 
  SEPTBMB8R, 
  WHEN 
  MONTHLT 
  

  

  BY 
  THB 
  

  

  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  

  

  OFFICB 
  OP 
  PUBUCATION 
  

  

  211 
  CHURCH 
  STREET 
  

   SASTOM, 
  PA. 
  

  

  Entered 
  a* 
  Second 
  Class 
  Matter, 
  January 
  25, 
  1919, 
  at 
  the 
  post-office 
  at 
  Baston, 
  Pa., 
  under 
  the 
  

   Act 
  of 
  August 
  24, 
  1912. 
  Acceptance 
  for 
  mailin!; 
  at 
  special 
  rate 
  of 
  postage 
  provided 
  for 
  

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

  

  