﻿234 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  Pirst 
  antennae 
  small, 
  very 
  rudimentary, 
  and 
  entirely 
  destitute 
  of 
  

   setae 
  or 
  spines; 
  they 
  are 
  also 
  concealed 
  between 
  folds 
  of 
  the 
  carapace 
  

   so 
  as 
  to 
  be 
  invisible. 
  Second 
  pair 
  of 
  good 
  size, 
  the 
  basal 
  joint 
  

   much 
  swollen, 
  the 
  terminal 
  claw 
  stout 
  and 
  strongly 
  curved. 
  First 
  

   maxilla 
  with 
  a 
  large 
  terminal 
  joint 
  tipped 
  with 
  two 
  spines; 
  second 
  

   maxilla 
  with 
  a 
  moderately 
  swollen 
  basal 
  joint, 
  and 
  a 
  long 
  and 
  weakly 
  

   curved 
  claw. 
  Maxillipcds 
  with 
  a 
  very 
  stout 
  basal 
  joint 
  and 
  a 
  short 
  

   terminal 
  claw, 
  bent 
  abruptly 
  near 
  the 
  base, 
  but 
  for 
  the 
  rest 
  of 
  its 
  

   length 
  almost 
  straight. 
  

  

  First 
  legs 
  rudimentary, 
  without 
  spines 
  or 
  setae 
  and 
  well 
  concealed 
  

   beneath 
  the 
  maxillipeds; 
  the 
  second 
  pair 
  are 
  reduced 
  to 
  mere 
  knobs 
  on 
  

   the 
  ventral 
  surface 
  of 
  two 
  prominent 
  ridges 
  running 
  parallel 
  mth 
  the 
  

   body 
  axis, 
  one 
  on 
  either 
  side 
  of 
  the 
  midline 
  and 
  quite 
  close 
  to 
  it. 
  The 
  

   thhd 
  legs 
  are 
  of 
  the 
  usual 
  plicate 
  form, 
  separated 
  to 
  their 
  base 
  along 
  

   the 
  midUne, 
  and 
  leaving 
  concave 
  grooves 
  externally 
  and 
  internally, 
  

   but 
  with 
  the 
  anterior 
  margin 
  a 
  straight 
  line. 
  These 
  legs 
  reach 
  only 
  

   a 
  trifle 
  beyond 
  the 
  posterior 
  margin 
  of 
  the 
  third 
  segment. 
  The 
  fourth 
  

   legs 
  are 
  biramose; 
  each 
  ramus 
  is 
  enlarged 
  at 
  the 
  base 
  and 
  then 
  rapidly 
  

   tapers 
  to 
  a 
  long, 
  cylindrical 
  and 
  bluntly 
  pointed 
  tip; 
  the 
  two 
  legs 
  

   almost 
  touch 
  along 
  the 
  midline 
  and 
  entirely 
  conceal 
  the 
  fifth 
  and 
  

   genital 
  segments 
  and 
  the 
  abdomen. 
  

  

  Color 
  a 
  yellowish-gray, 
  without 
  pigment 
  markings 
  of 
  any 
  sort. 
  

  

  Total 
  length 
  6.12 
  mm. 
  with 
  the 
  fourth 
  legs, 
  4.75 
  mm. 
  without 
  them. 
  

   Cephalothorax 
  1.35 
  mm. 
  long, 
  1 
  mm. 
  w^ide. 
  Second 
  and 
  third 
  

   segments 
  1.35 
  mm. 
  long, 
  1.70 
  mm. 
  wide. 
  Fourth 
  dorsal 
  plate 
  2.2 
  mm 
  

   long, 
  1.62 
  mm. 
  wide. 
  

  

  (spiculatus, 
  furnished 
  with 
  spines 
  or 
  points, 
  alluding 
  to 
  the 
  pointed 
  

   tips 
  of 
  the 
  fourth 
  legs.) 
  

  

  This 
  species 
  may 
  be 
  recognized 
  by 
  the 
  long 
  and 
  sharp-pointed 
  rami 
  

   of 
  the 
  fourth 
  legs, 
  which 
  project 
  very 
  prommently 
  behind 
  the 
  fourth 
  

   dorsal 
  plate, 
  by 
  the 
  entire 
  concealment, 
  ui 
  both 
  dorsal 
  and 
  ventral 
  

   views, 
  of 
  the 
  fifth 
  and 
  genital 
  segments 
  and 
  abdomen, 
  by 
  the 
  very- 
  

   rudimentary 
  form 
  of 
  the 
  second 
  legs 
  and 
  antennae, 
  and 
  by 
  the 
  size 
  and 
  

   shape 
  of 
  the 
  anal 
  laminae. 
  

  

  SAGUM, 
  new 
  genus. 
  

  

  General 
  body 
  form 
  similar 
  to 
  that 
  of 
  Lernanihrojnis. 
  Cephalo- 
  

   thorax 
  irregular 
  in 
  outline, 
  the 
  antennal 
  area 
  being 
  separated 
  from 
  the 
  

   head 
  by 
  deep 
  marginal 
  sinuses, 
  forming 
  a 
  sort 
  of 
  beak 
  or 
  rostrum, 
  and 
  

   the 
  carapace 
  being 
  produced 
  into 
  a 
  broad, 
  irregular 
  wing 
  on 
  each 
  

   lateral 
  margm. 
  Posterior 
  body 
  covered 
  with 
  a 
  single 
  dorsal 
  plate, 
  

   which 
  is 
  prolonged 
  at 
  the 
  posterior 
  corners 
  of 
  the 
  third 
  segment 
  into 
  

   very 
  large 
  lobes, 
  and 
  is 
  continuous 
  through 
  the 
  center 
  of 
  the 
  body 
  

   with 
  the 
  dorsal 
  plate 
  of 
  the 
  fourth 
  segment. 
  Antennae 
  and 
  mouth 
  

   parts 
  similar 
  to 
  those 
  in 
  Lemantliropus; 
  each 
  of 
  the 
  first 
  and 
  second 
  

  

  