﻿570 
  PROCEEDDSTGS- 
  GF 
  THE 
  NATIONAL 
  MtJSEUM 
  vol. 
  los 
  

  

  by 
  eosinophilous 
  glands. 
  The 
  copulatory 
  bursa 
  could 
  not 
  be 
  found 
  

   on 
  any 
  of 
  the 
  available 
  sections 
  but 
  its 
  slender 
  canal 
  was 
  more 
  or 
  

   less 
  in 
  evidence, 
  passing 
  dorsal 
  to 
  the 
  male 
  apparatus. 
  This 
  curves 
  

   downward 
  and 
  enters 
  the 
  dorsal 
  posterior 
  angle 
  of 
  the 
  greatly 
  ex- 
  

   panded 
  female 
  antrum, 
  which 
  exits 
  below 
  by 
  the 
  common 
  gonopore 
  

   and 
  receives 
  the 
  male 
  antrum 
  into 
  its 
  anterior 
  wall. 
  The 
  walls 
  of 
  

   the 
  female 
  antrum 
  are 
  greatly 
  thickened, 
  especially 
  dorsally. 
  This 
  

   thickening 
  consists 
  mainly 
  of 
  muscle 
  fibers, 
  chiefly 
  circular, 
  but 
  the 
  

   thick 
  dorsal 
  wall 
  seems 
  to 
  contain, 
  next 
  to 
  the 
  lining 
  epithelium, 
  a 
  

   glandular 
  layer 
  through 
  which 
  radial 
  fibers 
  pass. 
  

  

  Differential 
  diagnosis. 
  — 
  -Sphalloplana 
  georgiana 
  differs 
  from 
  other 
  

   species 
  of 
  the 
  genus 
  in 
  the 
  greatly 
  expanded 
  female 
  antrum 
  with 
  

   thick 
  walls, 
  presumably 
  serving 
  as 
  a 
  vagina. 
  

  

  Locality. 
  — 
  Collected 
  by 
  C. 
  E. 
  Mohr 
  in 
  Waterfall 
  Cave, 
  Trenton, 
  

   Ga., 
  Dec. 
  8, 
  1950. 
  

  

  Holotype. 
  — 
  The 
  best 
  of 
  the 
  specimens 
  has 
  been 
  mounted 
  whole 
  as 
  

   a 
  holotype 
  and 
  deposited 
  in 
  the 
  U. 
  S. 
  National 
  Museum 
  (USNM 
  

   24614). 
  However, 
  as 
  the 
  anterior 
  margin 
  of 
  this 
  specimen 
  appears 
  

   damaged, 
  a 
  whole 
  mount 
  of 
  the 
  anterior 
  part 
  of 
  another 
  specimen 
  

   showing 
  the 
  adhesive 
  organ 
  is 
  also 
  deposited. 
  

  

  Speophila 
  hoffmasteri, 
  new 
  species 
  

  

  Figures 
  66,a; 
  67,6; 
  68 
  

  

  Material. 
  — 
  Two 
  specimens 
  sent 
  by 
  the 
  U. 
  S. 
  National 
  Museum 
  

   and 
  one 
  specimen 
  presented 
  by 
  Leslie 
  Hubricht. 
  

  

  Form. 
  — 
  Size 
  moderate, 
  around 
  11 
  mm. 
  in 
  length, 
  plimip, 
  narrowed 
  

   at 
  the 
  ends; 
  anterior 
  margin 
  rounded 
  with 
  an 
  adhesive 
  organ 
  (fig. 
  

   66, 
  a). 
  

  

  Co/or.— 
  White. 
  

  

  Eyes. 
  — 
  Wanting. 
  

  

  General 
  structure. 
  — 
  The 
  histological 
  condition 
  of 
  the 
  worms 
  is 
  fair. 
  

   The 
  pharynx 
  appears 
  very 
  short 
  for 
  the 
  length 
  of 
  the 
  specimens 
  (fig. 
  

   66,a) 
  but 
  may 
  be 
  contracted. 
  The 
  intestinal 
  diverticula 
  were 
  not 
  

   clearly 
  evident 
  on 
  the 
  whole 
  mount. 
  The 
  body 
  margin 
  is 
  provided 
  

   with 
  a 
  thick 
  zone 
  of 
  enlarged 
  rhabdites 
  and 
  this 
  widens 
  considerably 
  

   on 
  the 
  tail 
  end, 
  which 
  therefore 
  must 
  be 
  highly 
  adhesive. 
  Such 
  a 
  

   wide 
  marginal 
  zone 
  of 
  large 
  rhabdites 
  is 
  characteristic 
  of 
  cave 
  plana- 
  

   rians 
  of 
  the 
  family 
  Kenkiidae 
  and 
  gives 
  these 
  worms 
  unusual 
  ability 
  

   to 
  cling 
  to 
  objects. 
  

  

  Adhesive 
  organ. 
  — 
  At 
  the 
  anterior 
  margin 
  there 
  is 
  a 
  conspicuous 
  and 
  

   well-developed 
  adhesive 
  organ 
  of 
  the 
  type 
  characteristic 
  of 
  the 
  genus. 
  

   It 
  is 
  shown 
  in 
  surface 
  view 
  in 
  figure 
  66,a, 
  and 
  in 
  sagittal 
  section 
  in 
  

   figure 
  67,6. 
  The 
  surface 
  epithelium 
  stops 
  as 
  usual 
  at 
  the 
  lips 
  of 
  the 
  

   organ 
  which 
  is 
  lined 
  throughout 
  with 
  an 
  indefinite 
  layer 
  filled 
  with 
  

  

  