﻿688 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [84] 
  

  

  advanced 
  to 
  show 
  essentially 
  the 
  adult 
  form, 
  and 
  arc 
  very 
  character- 
  

   istic. 
  These 
  appendages 
  are 
  each 
  long 
  and 
  very 
  narrow, 
  about 
  three 
  

   times 
  as 
  long 
  as 
  broad. 
  There 
  is 
  a 
  small 
  and 
  narrow 
  lobe 
  on 
  the 
  ante- 
  

   rior 
  side 
  near 
  the 
  base 
  of 
  the 
  lamella; 
  the 
  outer 
  edge 
  is 
  slightly 
  thick- 
  

   ened, 
  and 
  terminates 
  in 
  a 
  short 
  rounded 
  lobe 
  a 
  little 
  way 
  from 
  the 
  tip, 
  

   which 
  is 
  about 
  half 
  as 
  wide 
  as 
  the 
  proximal 
  part 
  of 
  the 
  lamella 
  and 
  

   deeply 
  bilobed, 
  and 
  near 
  the 
  middle 
  of 
  the 
  mesial 
  edge 
  there 
  is 
  a 
  slight 
  

   einargination, 
  probably 
  marking 
  the 
  distal 
  end 
  of 
  that 
  part 
  of 
  the 
  edge 
  

   whicb 
  articulates 
  with 
  the 
  lamella 
  of 
  the 
  opposite 
  side. 
  

   This 
  specimen, 
  from 
  station 
  2187, 
  gives 
  the 
  following 
  : 
  

  

  Measurements 
  in 
  millimeters. 
  

  

  Length 
  from 
  tip 
  of 
  rostrum 
  to 
  tip 
  of 
  telson 
  33+ 
  

  

  Length 
  of 
  carapax, 
  including 
  rostrum 
  12. 
  5 
  

  

  Length 
  of 
  rostrum 
  4.0 
  

  

  Length 
  of 
  eye-stalk 
  and 
  eye 
  2. 
  5 
  

  

  G 
  rea 
  I 
  est 
  diameter 
  of 
  eye 
  2. 
  I 
  

  

  Length 
  of 
  antennal 
  scale 
  5. 
  fi 
  

  

  Breadth 
  of 
  antennal 
  scale 
  l.b' 
  

  

  Length 
  of 
  flagellum 
  of 
  antenna 
  100+ 
  

  

  HYMENOPENiEUS 
  MICROPS 
  Smith. 
  

  

  CPlateXVI, 
  Fig. 
  8.) 
  

  

  Station 
  2224, 
  September 
  8, 
  north 
  lat. 
  3G° 
  W 
  30", 
  west 
  long. 
  G8° 
  21', 
  

   2,574 
  fathoms, 
  globigerina 
  ooze, 
  temperature 
  37° 
  ; 
  15,19 
  (8001), 
  both 
  

   in 
  bad 
  condition 
  and 
  imperfect. 
  

  

  A 
  single 
  fragmentary 
  female 
  (7155), 
  in 
  addition 
  to 
  the 
  two 
  specimens 
  

   already 
  recorded 
  from 
  the 
  collection 
  of 
  1883, 
  was 
  taken 
  at 
  station 
  

   2012, 
  July 
  30, 
  north 
  lat. 
  39° 
  30', 
  west. 
  long. 
  68° 
  26' 
  15", 
  1,555 
  fathoms, 
  

   globigerina 
  ooze, 
  temperature 
  38°. 
  

  

  In 
  the 
  male, 
  from 
  station 
  2221, 
  the 
  carapax, 
  including 
  the 
  rostrum, 
  is 
  

   20 
  mm 
  long, 
  and 
  the 
  appendages 
  of 
  the 
  first 
  pleopods 
  arc 
  fully 
  developed. 
  

   Each 
  of 
  these 
  appendages 
  is 
  a 
  large 
  squarish 
  lamellar 
  plate, 
  consid- 
  

   erably 
  narrowed 
  distally, 
  attached 
  by 
  a 
  very 
  short 
  and 
  narrow 
  peduncle, 
  

   and 
  with 
  the 
  outer 
  and 
  distal 
  margins 
  slightly 
  thickened, 
  the 
  latter 
  

   irregularly 
  lobed, 
  and 
  the 
  median 
  portion 
  longitudinally 
  plicated. 
  There 
  

   is 
  a 
  narrow, 
  obtusely-tipped 
  lobe 
  on 
  the 
  mesial 
  side 
  of 
  the 
  peduncle, 
  

   and 
  close 
  to 
  it, 
  on 
  the 
  base 
  of 
  the 
  pleopod 
  itself, 
  a 
  similar 
  but 
  more 
  

   triangular 
  lobe. 
  The 
  outer 
  margin 
  terminates 
  at 
  the 
  distal 
  end 
  in 
  a 
  

   broad 
  rounded 
  lobe, 
  on 
  the 
  mesial 
  side 
  of 
  which 
  there 
  is 
  a 
  very 
  much 
  

   smaller 
  rounded 
  lobe, 
  then 
  a 
  deep 
  sinus, 
  and 
  then 
  a 
  broader 
  bidentate 
  

   lobe 
  at 
  the 
  mesial 
  side 
  of 
  the 
  distal 
  margin. 
  The 
  mesial 
  edge 
  is 
  nearly 
  

   straight, 
  except 
  a 
  slight 
  emargination 
  near 
  the 
  middle, 
  separating 
  the 
  

   proximal 
  articular 
  from 
  the 
  distal 
  unarmed 
  portion, 
  

  

  