﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  44 
  PL. 
  4. 
  

  

  Trachomedusae 
  and 
  Scyphomedusae 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  118 
  

  

  HtLtOTrce 
  CO,. 
  BOSTON 
  

  

  