﻿JULY 
  19, 
  1922 
  

  

  COBB: 
  GREEFFIELLA 
  

  

  301 
  

  

  so 
  that 
  it 
  becomes 
  as 
  wide 
  as 
  the 
  head, 
  or 
  one-half 
  as 
  wide 
  as 
  the 
  corresponding 
  

   portion 
  of 
  the 
  neck, 
  that 
  is 
  to 
  say 
  that 
  portion 
  of 
  the 
  neck 
  marked 
  by 
  the 
  fifth 
  

   circlet 
  of 
  cervical 
  setae. 
  At 
  this 
  point 
  there 
  is 
  a 
  rather 
  faint 
  diminution 
  of 
  

   the 
  oesophagus, 
  which 
  continues 
  thence 
  a 
  little 
  narrower, 
  afterward 
  widening 
  

   out, 
  and 
  then 
  soon 
  coming 
  to 
  contain 
  granules 
  like 
  those 
  found 
  in 
  the 
  cells 
  of 
  

   the 
  intestine. 
  This 
  latter 
  appears 
  to 
  begin 
  about 
  opposite 
  the 
  tenth 
  row 
  of 
  

   setae. 
  There 
  are 
  two 
  narrow 
  ducts, 
  one 
  emptying 
  into 
  the 
  posterior 
  part 
  of 
  

   each 
  amphid; 
  these 
  ducts 
  can 
  be 
  followed 
  backward 
  to 
  near 
  the 
  pigmented 
  

   bodies 
  soon 
  to 
  be 
  mentioned, 
  and 
  possibl}'- 
  may 
  be 
  connected 
  with 
  them. 
  The 
  

   external 
  expressions 
  of 
  the 
  amphids, 
  each 
  of 
  which 
  is 
  symmetrical 
  to 
  two 
  

   lines, 
  are 
  of 
  unequal 
  diameter, 
  without 
  central 
  markings, 
  and 
  are 
  located 
  

   toward 
  the 
  front 
  of 
  the 
  head; 
  they 
  are 
  about 
  as 
  wide 
  as 
  the 
  corresponding 
  

   portion 
  of 
  the 
  head, 
  each 
  being 
  about 
  twice 
  as 
  wide 
  as 
  long. 
  The 
  two 
  

   greenish 
  pigmented 
  bodies 
  mentioned 
  above 
  (org?. 
  Fig. 
  2), 
  are 
  olive 
  green 
  in 
  

   color 
  and 
  present 
  a 
  nucleus 
  in 
  the 
  midst 
  

   of 
  a 
  colorless 
  spherical 
  cell 
  (?) 
  as 
  wide 
  nor 
  (Jfup/l- 
  . 
  

   as 
  one 
  of 
  the 
  cuticular 
  annules 
  in 
  the 
  

   immediate 
  vicinity. 
  These 
  bodies 
  are 
  

   naturally 
  rather 
  difficult 
  to 
  observe 
  

   on 
  account 
  of 
  the 
  hairy 
  nature 
  of 
  the 
  

   cuticle 
  tlirough 
  which 
  they 
  are 
  viewed 
  ; 
  

   they 
  are 
  located 
  well 
  outside 
  the 
  in- 
  

   testine, 
  one 
  on 
  each 
  side 
  of 
  the 
  bod}^ 
  

   somewhat 
  behind 
  the 
  base 
  of 
  the 
  neck. 
  

   The 
  broad 
  cardiac 
  constriction 
  Hes 
  

   opposite 
  the 
  eighth 
  to 
  tenth 
  rows 
  of 
  

   setae, 
  and 
  is 
  about 
  as 
  wide 
  as 
  the 
  

   distance 
  between 
  these 
  roAvs. 
  The 
  

   thick-walled 
  intestine 
  presents 
  a 
  faint 
  

   lumen 
  and 
  is 
  composed 
  of 
  cells 
  of 
  

   such 
  a 
  size 
  that 
  about 
  twelve 
  occur 
  

   in 
  each 
  cross 
  section. 
  In 
  the 
  male, 
  at 
  

   least, 
  the 
  intestine 
  gradually 
  becomes 
  

   one-half 
  as 
  wide 
  as 
  the 
  body. 
  There 
  

   is 
  no 
  pre-rectum. 
  From 
  the 
  minute 
  

   anus, 
  whose 
  anterior 
  lip 
  is 
  somewhat 
  

   elevated, 
  the 
  inconspicuous 
  rectum 
  

   extends 
  inward 
  at 
  right 
  angles 
  to 
  the 
  

   ventral 
  surface 
  half 
  way 
  across 
  the 
  

   body 
  ; 
  the 
  intestine 
  itself 
  extends 
  past 
  

   the 
  anus. 
  No 
  anal 
  muscles 
  are 
  to 
  be 
  

   seen. 
  There 
  are 
  two 
  kinds 
  of 
  colorless 
  

   granules 
  of 
  variable 
  size 
  to 
  be 
  seen 
  in 
  

   the 
  cells 
  of 
  the 
  intestine; 
  the 
  largest 
  

   of 
  these 
  have 
  a 
  diameter 
  equal 
  to 
  the 
  

   distance 
  between 
  the 
  rows 
  of 
  somatic 
  

   setae; 
  the 
  finest 
  of 
  the 
  granules 
  are 
  

   exceedingly 
  fine 
  . 
  The 
  granules 
  are 
  not 
  

  

  XIOOO 
  

  

  y^l 
  

  

  grn 
  mj 
  ml 
  •'■O^ 
  

  

  Fig. 
  2. 
  — 
  Internal 
  anatomy 
  of 
  the* 
  head 
  

   end 
  of 
  Greeffiella 
  dasyura. 
  Lettering 
  as 
  in 
  

   Fig. 
  1. 
  cl 
  int, 
  one 
  of 
  the 
  cells 
  of 
  the 
  

   intestine; 
  crd 
  col, 
  cardiac 
  coUum; 
  dct 
  amph, 
  

   duct 
  connecting 
  with 
  the 
  amphidial 
  pore; 
  

   gni 
  maj 
  int, 
  one 
  of 
  the 
  larger 
  intestinal 
  

   granules; 
  grn 
  min 
  int, 
  smaller 
  intestinal 
  

   granules; 
  int, 
  intestine; 
  luni 
  int, 
  lumen 
  

   of 
  the 
  intestine; 
  nr, 
  nerve 
  ring; 
  org 
  ?, 
  

   organ 
  of 
  doubtful 
  significance; 
  set 
  tb, 
  

   tubular 
  seta. 
  

  

  SO 
  arranged 
  as 
  to 
  give 
  rise 
  to 
  a 
  tessel- 
  

   lated 
  effect. 
  The 
  more 
  or 
  less 
  convex-conoid 
  tail 
  tapers 
  from 
  in 
  front 
  of 
  the 
  

   anus 
  to 
  the 
  tubular 
  spinneret, 
  which 
  comprises 
  two-sevenths 
  of 
  the 
  whole 
  

  

  