﻿466 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  in 
  the 
  center 
  of 
  each 
  one 
  of 
  the 
  thoracic 
  segments. 
  All 
  the 
  exposed 
  

   edges 
  of 
  the 
  body 
  are 
  tinged 
  with 
  a 
  bright 
  orange. 
  

  

  Tins 
  species 
  can 
  readily 
  be 
  distinguished 
  from 
  S. 
  dugesi, 
  to 
  which 
  it 
  

   is 
  closely 
  related, 
  by 
  the 
  absence 
  of 
  hairs 
  on 
  the 
  body, 
  by 
  the 
  relative 
  

   length 
  of 
  the 
  uropods, 
  the 
  outer 
  one 
  l)eing 
  only 
  half 
  as 
  long 
  as 
  the 
  

   inner 
  one, 
  while 
  in 
  8. 
  diigesi 
  they 
  are 
  of 
  equal 
  length, 
  and 
  by 
  the 
  differ- 
  

   ence 
  in 
  color. 
  

  

  Type.—^o. 
  L9609, 
  U.S.K.M. 
  

  

  