﻿NO. 
  1950. 
  CRUSTACEAN 
  PARASITES 
  OF 
  FISH 
  AND 
  CRABS— 
  WILSON. 
  259 
  

  

  Color 
  jellowish-brown, 
  considerably 
  darker 
  than 
  the 
  female. 
  

   Total 
  length, 
  1.35 
  mm. 
  Greatest 
  width, 
  0.5 
  mm. 
  

  

  CLAVELLA 
  (ANCHORELLA) 
  LACINIATA 
  Krfjyer. 
  

  

  Plate 
  49. 
  

   Anchorella 
  ladniata 
  Kr0yer, 
  1863, 
  p. 
  308, 
  pi. 
  16, 
  figs. 
  8a 
  and 
  h. 
  

  

  Host 
  and 
  record 
  of 
  specimens 
  — 
  Kr0yer 
  obtained 
  two 
  females 
  from 
  

   the 
  gills 
  of 
  a 
  fish 
  which 
  he 
  designated 
  as 
  ^'Acanthurus 
  chirurgus," 
  

   but 
  which 
  is 
  now 
  known 
  as 
  Teuthis 
  hepatus, 
  the 
  doctor 
  fish, 
  from 
  the 
  

   Danish 
  West 
  Indies. 
  Upon 
  these 
  he 
  founded 
  a 
  new 
  species 
  of 
  the 
  

   genus 
  Clavella 
  (Anchorella), 
  which 
  he 
  named 
  A. 
  ladniata. 
  

  

  During 
  the 
  season 
  of 
  1910 
  five 
  females 
  and 
  two 
  males 
  were 
  found 
  

   attached 
  to 
  the 
  skin 
  in 
  the 
  roof 
  of 
  the 
  mouth 
  of 
  the 
  same 
  host 
  at 
  

   Montego 
  Bay, 
  Jamaica. 
  Cat. 
  No. 
  42310, 
  U.S.N.M. 
  

  

  Female. 
  — 
  General 
  body 
  form 
  short 
  and 
  plump; 
  cephalothorax 
  

   longer 
  than 
  the 
  posterior 
  bod}^ 
  and 
  nearly 
  reaching 
  the 
  ends 
  of 
  the 
  

   egg-strings, 
  flexed 
  backward 
  against 
  the 
  dorsal 
  body 
  surface, 
  and 
  of 
  

   the 
  same 
  diameter 
  throughout. 
  Not 
  only 
  are 
  the 
  arms 
  entirely 
  lack- 
  

   ing 
  but 
  the 
  attachment 
  bulla 
  is 
  even 
  placed 
  at 
  the 
  bottom 
  of 
  a 
  pit, 
  

   below 
  the 
  level 
  of 
  the 
  body 
  surface. 
  Posterior 
  body 
  bell-shaped, 
  

   the 
  apex 
  and 
  one 
  side 
  of 
  the 
  bell 
  fastened 
  to 
  the 
  cephalothorax, 
  the 
  

   margin 
  laciniate 
  or 
  cut 
  into 
  conical 
  processes, 
  six 
  in 
  number, 
  two 
  pos- 
  

   terior, 
  two 
  lateral, 
  and 
  two 
  anterior, 
  while 
  the 
  mouth 
  of 
  the 
  bell, 
  be- 
  

   tween 
  the 
  bases 
  of 
  the 
  processes, 
  is 
  covered 
  by 
  the 
  posterior 
  body 
  

   wall. 
  The 
  anterior 
  and 
  posterior 
  processes 
  are 
  about 
  equal 
  in 
  size, 
  

   and 
  are 
  one-third 
  the 
  length 
  of 
  the 
  posterior 
  body; 
  the 
  lateral 
  pro- 
  

   cesses 
  are 
  much 
  smaller. 
  

  

  Abdomen, 
  situated 
  in 
  the 
  angle 
  between 
  the 
  two 
  posterior 
  processes, 
  

   minute 
  and 
  nearly 
  spherical. 
  Egg-cases 
  ellipsoidal, 
  half 
  the 
  length 
  and 
  

   width 
  of 
  the 
  posterior 
  body, 
  and 
  attached 
  to 
  the 
  flattened 
  surface 
  

   between 
  the 
  bases 
  of 
  all 
  the 
  processes; 
  eggs 
  large, 
  arranged 
  in 
  five 
  

   or 
  six 
  rows, 
  about 
  10 
  in 
  each 
  row. 
  

  

  First 
  antennae 
  conical, 
  distinctly 
  three-jointed, 
  the 
  last 
  joint 
  tipped 
  

   with 
  two 
  spines, 
  the 
  others 
  unarmed. 
  Second 
  antenna3 
  closely 
  ap- 
  

   pressed 
  to 
  the 
  anterior 
  margin 
  and 
  bipartite 
  at 
  the 
  tip, 
  the 
  inner 
  

   ramus 
  two-jointed 
  and 
  ending 
  in 
  a 
  claw, 
  the 
  outer 
  one 
  one-jointed 
  and 
  

   unarmed. 
  Proboscis 
  a 
  broad 
  cone, 
  projecting 
  prominently 
  from 
  the 
  

   ventral 
  surface 
  of 
  the 
  head. 
  

  

  First 
  maxillge 
  ending 
  in 
  two 
  long 
  spines; 
  palp 
  minute, 
  one-jointed, 
  

   attached 
  to 
  the 
  inner 
  margin 
  close 
  to 
  the 
  distal 
  end. 
  

  

  Maxillipeds 
  with 
  a 
  swollen 
  triangular 
  basal 
  joint, 
  and 
  a 
  slender, 
  

   nearly 
  straight 
  terminal 
  claw. 
  The 
  latter 
  is 
  attached 
  to 
  the 
  side 
  

   rather 
  than 
  the 
  tip 
  of 
  the 
  basal 
  joint, 
  and 
  carries 
  an 
  accessory 
  spine 
  

   on 
  its 
  inner 
  margin 
  toward 
  the 
  tip. 
  Near 
  the 
  center 
  of 
  the 
  inner 
  mar- 
  

  

  