﻿294 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  »8 
  

  

  Ciltmculus. 
  However, 
  Acanthatmnothella 
  has 
  a 
  short 
  second 
  joint 
  

   of 
  the 
  oviger 
  and 
  lacks 
  auxiliary 
  claws 
  on 
  the 
  legs, 
  which 
  are 
  present 
  

   in 
  all 
  the 
  known 
  species 
  of 
  €ilunculus. 
  The 
  latter 
  character 
  is 
  not 
  a 
  

   good 
  generic 
  character, 
  since 
  it 
  does 
  not 
  hold 
  in 
  such 
  genera 
  as 
  Nym,- 
  

   phon 
  and 
  Pycnogommi 
  and 
  in 
  Ammothella 
  there 
  is 
  one 
  species, 
  

   iMiiunffuiculata 
  (Dohrn) 
  which 
  lacks 
  auxiliaries, 
  and 
  another, 
  bi- 
  

   unguiculata 
  (Dohrn) 
  which 
  has 
  auxiliaries 
  but 
  lacks 
  the 
  main 
  ter- 
  

   minal 
  claw. 
  The 
  cement 
  glands 
  of 
  Acanthammothella 
  are 
  mentioned 
  

   as 
  "abundant," 
  which 
  indicates 
  that 
  this 
  form 
  does 
  not 
  have 
  the 
  fem- 
  

   oral 
  tube 
  of 
  the 
  typical 
  Cilunculus. 
  Inasmuch 
  as 
  a 
  great 
  variety 
  of 
  

   forms 
  of 
  the 
  cement 
  gland, 
  from 
  a 
  row 
  of 
  open 
  pores 
  to 
  an 
  elaborate 
  

   vesicular 
  process, 
  occurs 
  in 
  Anoplodactylus 
  (Hedgpeth, 
  1948, 
  p. 
  219), 
  

   and 
  a 
  tubular 
  gland 
  is 
  present 
  in 
  most 
  species 
  of 
  Aminothella 
  but 
  

   lacking 
  in 
  A. 
  hi-unguiculata^ 
  the 
  presence 
  or 
  absence 
  of 
  this 
  structure 
  

   is 
  at 
  best 
  an 
  incomplete 
  character. 
  Except 
  for 
  the 
  short 
  second 
  joint 
  

   of 
  the 
  oviger, 
  therefore, 
  Mello-Leitao's 
  Acanthammothella 
  cannot 
  

   be 
  separated 
  from 
  Cilunculus 
  and 
  its 
  general 
  form 
  indicates 
  its 
  close 
  

   relationship 
  to 
  that 
  genus. 
  In 
  the 
  structure 
  of 
  the 
  oviger 
  it 
  resembles 
  

   Heterofragilia, 
  a 
  genus 
  from 
  the 
  Lesser 
  Antilles. 
  It 
  is 
  apparent 
  that 
  

   those 
  various 
  small 
  ammotheid 
  genera 
  are 
  in 
  need 
  of 
  more 
  thorough 
  

   study. 
  

  

  CILUNCULUS 
  ARMATUS 
  (Bohm) 
  

   FiGUBJB 
  43 
  

  

  I.ecytJwrhynchus 
  armatus 
  Bohm, 
  1879c, 
  pp. 
  141-142. 
  

  

  Parazetes 
  puiescens 
  Oktmann, 
  1891, 
  pp. 
  163-164, 
  pi. 
  24, 
  figs. 
  5, 
  a-d. 
  

  

  Cilunculus 
  armatus 
  Loman, 
  1911, 
  pp. 
  9-11, 
  pi. 
  1, 
  figs. 
  1-8. 
  

  

  Collecting 
  records. 
  — 
  Albatross 
  stations 
  3734: 
  (1 
  female) 
  ; 
  5021 
  (1 
  

   ovigerous 
  male, 
  1 
  female) 
  ; 
  5037 
  (1 
  female). 
  

  

  Loman's 
  figures 
  do 
  not 
  do 
  justice 
  to 
  this 
  quaint 
  little 
  creature 
  and 
  

   since 
  his 
  paper 
  is 
  not 
  easily 
  accessible 
  I 
  have 
  figured 
  a 
  specimen 
  from 
  

   Albatross 
  station 
  3734. 
  The 
  processes 
  and 
  tubercles 
  on 
  the 
  trunk 
  

   and 
  lateral 
  processes 
  are 
  more 
  prominent 
  than 
  would 
  appear 
  from 
  

   his 
  drawings. 
  The 
  proboscis 
  is 
  prominently 
  egg-shaped, 
  which 
  is 
  the 
  

   best 
  field 
  mark 
  for 
  separating 
  it 
  from 
  the 
  species 
  of 
  Ascorhynchus. 
  

   The 
  overhanging 
  forward 
  edge 
  of 
  the 
  trunk 
  or 
  cephalic 
  segment 
  seems 
  

   to 
  be 
  a 
  character 
  of 
  the 
  genus, 
  as 
  is 
  the 
  possession 
  of 
  a 
  prominent 
  

   femoral 
  gland 
  duct 
  in 
  the 
  male, 
  located 
  in 
  this 
  species 
  about 
  midway 
  

   on 
  the 
  dorsal 
  surface 
  of 
  that 
  joint. 
  This 
  is 
  evidently 
  a 
  cold-water 
  

   form, 
  occurring 
  from 
  Sagami 
  Bay 
  to 
  the 
  Sea 
  of 
  Okhotsk. 
  

  

  Genus 
  LECYTHORHYNCHUS 
  Bohm, 
  1879 
  

  

  Loman 
  (1908, 
  p. 
  54) 
  appears 
  to 
  have 
  been 
  the 
  first 
  to 
  suggest 
  that 
  

   this 
  genus 
  belongs 
  in 
  the 
  Ammotheidae. 
  

  

  