﻿NOV. 
  4, 
  1922 
  

  

  COBB 
  : 
  A 
  New 
  SPECIES 
  OF 
  NYGOL,AIMUS 
  

  

  417 
  

  

  appendages. 
  On 
  each 
  lateral 
  field, 
  extending 
  from 
  near 
  the 
  head 
  to 
  

   the 
  tail, 
  there 
  is 
  a 
  double 
  series 
  of 
  sublateral 
  pores 
  not 
  forming 
  exact 
  

   lines 
  but 
  arranged 
  slightly 
  irregularly, 
  the 
  distance 
  between 
  them 
  aver- 
  

   aging 
  somewhat 
  less 
  than 
  the 
  diameter 
  of 
  the 
  body. 
  This 
  distance, 
  

   however, 
  varies 
  somewhat 
  and 
  is 
  perhaps 
  a 
  little 
  greater 
  anteriorly 
  

   than 
  posteriorly, 
  so 
  that 
  there 
  are 
  toward 
  one 
  hundred 
  fifty 
  pores 
  on 
  

   each 
  lateral 
  field. 
  Each 
  of 
  these 
  organs 
  at 
  its 
  surface 
  presents 
  a 
  

   slight 
  but 
  relatively 
  broad 
  depression 
  in 
  the 
  cuticle. 
  From 
  the 
  center 
  

   of 
  this 
  depression 
  there 
  extends 
  inward 
  at 
  right 
  angles 
  to 
  the 
  surface 
  of 
  

   the 
  body 
  a 
  narrow 
  tube, 
  three-fourths 
  of 
  a 
  micron 
  in 
  diameter, 
  which 
  

   extends 
  to 
  the 
  lateral 
  chord, 
  where 
  it 
  rather 
  suddenly 
  expands 
  and 
  

   connects 
  with 
  a 
  broadly 
  saccate 
  unicellular 
  gland 
  located 
  in 
  the 
  tissue 
  

   of 
  the 
  chord. 
  These 
  glands 
  and 
  ducts 
  are 
  a 
  prominent 
  feature 
  of 
  the 
  

   anatomy 
  of 
  the 
  living 
  nema 
  and 
  strike 
  the 
  observer 
  at 
  first 
  glance, 
  

  

  jj^ 
  especially 
  if 
  the 
  nema 
  be 
  

   viewed 
  dorso-ventrally. 
  

  

  'VU„ 
  

  

  pl/'c 
  vstbl 
  

  

  The 
  neck, 
  which 
  is 
  cylin- 
  

   droid 
  posteriorly 
  and 
  more 
  

   or 
  less 
  conoid 
  anteriorly, 
  

   becomes 
  convex-conoid 
  at 
  

   the 
  continuous, 
  subtrun- 
  

   cate 
  to 
  truncate, 
  head. 
  

   The 
  mouth 
  opening 
  is 
  cen- 
  

   tral, 
  depressed, 
  and 
  rela- 
  

   tively 
  conspicuous. 
  It 
  is 
  

   surrounded 
  by 
  six 
  conflu- 
  

   ent, 
  subspherical, 
  well- 
  

   developed 
  lips, 
  each 
  sup- 
  

   plied 
  with 
  two 
  minute 
  

   papillae 
  which 
  do 
  not 
  in- 
  

   terfere 
  with 
  the 
  rounded 
  

   contour 
  of 
  the 
  lip 
  ; 
  one 
  of 
  

  

  Somewhat 
  oblique 
  ventral 
  

   head 
  end 
  of 
  Nygclaimus 
  denticulatus 
  n.sp. 
  

   and 
  posterior 
  labial 
  papillae; 
  amph, 
  

  

  X 
  800 
  

  

  view 
  of 
  the 
  

   ppl, 
  anterior 
  

   amphid; 
  dnt, 
  

  

  denticles 
  Uning 
  the 
  wall 
  of 
  the 
  pharynx; 
  cav 
  anl 
  ph, 
  

  

  cav 
  md 
  ph, 
  cav 
  post 
  ph, 
  anterior, 
  median 
  and 
  posterior 
  ■(■J^gjjj 
  jg 
  outward 
  pointing 
  

   segments 
  of 
  the 
  pharynx; 
  wn^r 
  ^/t, 
  wall 
  of 
  the 
  pharynx; 
  j 
  +t, 
  +t, 
  1 
  V> 
  1 
  

  

  SM5-c«/,subcuticle;o^, 
  oesophagus 
  ;/6, 
  lip 
  region; 
  on 
  M. 
  ^^^ 
  ^^^ 
  °^^^^ 
  ^^^° 
  Dareiy 
  

  

  onchium; 
  has 
  ph, 
  hasQ 
  oi 
  fh^ 
  vhaxynx; 
  phc 
  vsth, 
  folds 
  OUtward 
  pointing. 
  This 
  

  

  in 
  the 
  vestibule. 
  latter, 
  the 
  anterior 
  one, 
  

  

  is 
  located 
  near 
  the 
  border 
  of 
  the 
  lip 
  region 
  ; 
  the 
  posterior 
  one, 
  somewhat 
  

   farther 
  back 
  and 
  on 
  the 
  outer 
  surface 
  of 
  the 
  lip 
  region. 
  It 
  seems 
  possi- 
  

   ble 
  that 
  the 
  lips, 
  or 
  some 
  of 
  them, 
  present 
  additional 
  very 
  faint 
  papillae. 
  

   The 
  somewhat 
  hexagonal 
  lip 
  region, 
  which 
  is 
  nine 
  microns 
  high 
  and 
  

  

  