﻿262 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  VOL. 
  98 
  

  

  NYMPHON 
  DISSIMILIS, 
  new 
  species 
  

  

  Figure 
  28 
  

  

  Holotype 
  (/emaZe).— 
  U.S.N.M. 
  No. 
  80587, 
  Albatross 
  station 
  4780, 
  

   latitude 
  52°01' 
  N., 
  longitude 
  174°39' 
  E., 
  1,046 
  fathoms, 
  35.9° 
  F., 
  

   June 
  7, 
  1906. 
  

  

  Description. 
  — 
  Trunk 
  smooth, 
  elongate, 
  narrowly 
  oval 
  in 
  outline, 
  

   lateral 
  processes 
  separated 
  by 
  one 
  and 
  one-half 
  times 
  their 
  diameter. 
  

   Neck 
  long, 
  slender. 
  Eye 
  tubercle 
  prominent, 
  narrowly 
  pointed, 
  and 
  

   with 
  four 
  large 
  eyes. 
  

  

  Proboscis 
  slightly 
  heavier 
  and 
  shorter 
  than 
  neck, 
  cylindrical, 
  and 
  

   boldly 
  rounded 
  at 
  tip. 
  

  

  Abdomen 
  not 
  quite 
  so 
  long 
  as 
  last 
  lateral 
  process, 
  papilliform, 
  

   rounded 
  at 
  tip, 
  directed 
  at 
  an 
  angle 
  of 
  about 
  40°. 
  

  

  Chelif 
  ore 
  : 
  Scape 
  rather 
  heavy, 
  shorter 
  than 
  proboscis. 
  Chela 
  about 
  

   as 
  long 
  as 
  scape, 
  palm 
  moderately 
  thick, 
  fingers 
  about 
  as 
  long 
  as 
  palm, 
  

   slender, 
  moderately 
  curved, 
  with 
  more 
  than 
  20 
  well-spaced 
  short 
  

   spinules 
  on 
  each 
  finger. 
  

  

  Palpus 
  somewhat 
  longer 
  than 
  proboscis, 
  second 
  and 
  third 
  joints 
  

   subequal, 
  fourth 
  segment 
  half 
  as 
  long 
  as 
  fifth, 
  the 
  fifth 
  alone 
  almost 
  

   as 
  long 
  as 
  tlie 
  third. 
  

  

  Oviger 
  : 
  Fourth 
  joint 
  rather 
  heavy, 
  straight, 
  with 
  a 
  large 
  pore 
  near 
  

   the 
  proximal 
  end, 
  fifth 
  joint 
  about 
  a 
  third 
  again 
  as 
  long, 
  straight, 
  

   slightly 
  swollen 
  distally. 
  Compound 
  spines 
  coarsely 
  toothed, 
  ter- 
  

   minal 
  claw 
  slender, 
  curved, 
  almost 
  as 
  long 
  as 
  terminal 
  joint, 
  with 
  a 
  

   dozen 
  or 
  more 
  spinules. 
  Spine 
  formula 
  : 
  10 
  : 
  8 
  : 
  8 
  : 
  7 
  : 
  : 
  12. 
  

  

  Third 
  leg: 
  First 
  and 
  third 
  coxae 
  subequal, 
  second 
  coxae 
  as 
  long 
  as 
  

   first 
  and 
  third 
  together. 
  Femur 
  not 
  quite 
  twice 
  as 
  long 
  as 
  coxae, 
  

   relatively 
  straight. 
  First 
  tibia 
  slightly 
  longer 
  than 
  femur, 
  second 
  

   tibia 
  half 
  again 
  as 
  long 
  as 
  first, 
  with 
  an 
  investment 
  of 
  fine 
  setae. 
  

   Tarsus 
  little 
  more 
  than 
  half 
  as 
  long 
  as 
  propodus, 
  with 
  coarse 
  spines 
  

   along 
  sole. 
  Propodus 
  with 
  much 
  heavier 
  spines, 
  some 
  of 
  them 
  longer 
  

   than 
  the 
  diameter 
  of 
  the 
  joint, 
  scattered 
  between 
  shorter 
  spines. 
  Ter- 
  

   minal 
  claw 
  heavy, 
  half 
  as 
  long 
  as 
  propodus. 
  Auxiliaries 
  about 
  one- 
  

   fourth 
  as 
  long 
  as 
  terminal 
  claw. 
  

  

  Measurements. 
  — 
  As 
  follows 
  : 
  

  

  Mm. 
  

  

  Proboscis 
  -fl. 
  5 
  

  

  Trunk 
  6. 
  5 
  

  

  Second 
  lateral 
  process, 
  width 
  3. 
  25 
  

  

  Abdomen 
  . 
  6 
  

  

  Scape 
  2. 
  

  

  Chela 
  2. 
  

  

  Palpus 
  2. 
  75 
  

  

  Third 
  leg: 
  Mm. 
  

  

  First 
  coxa 
  1.0 
  

  

  Second 
  coxa 
  2.5 
  

  

  Third 
  coxa 
  1.1 
  

  

  Femur 
  8.0 
  

  

  First 
  tibia 
  8.25 
  

  

  Second 
  tibia 
  11. 
  25 
  

  

  Tarsus 
  . 
  8 
  

  

  Propodus 
  1. 
  6 
  

  

  Terminal 
  claw 
  . 
  75 
  

  

  Auxiliary 
  claw 
  .2 
  

  

  