﻿566 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  duct 
  passing 
  anteriorly 
  above 
  the 
  male 
  apparatus 
  and 
  terminating 
  in 
  

   a 
  rather 
  small 
  sac, 
  the 
  copulatory 
  bursa, 
  situated 
  immediately 
  anterior 
  

   to 
  the 
  penis 
  bulb, 
  between 
  this 
  and 
  the 
  posterior 
  end 
  of 
  the 
  pharyn- 
  

   geal 
  chamber 
  (fig. 
  65, 
  c). 
  The 
  entire 
  female 
  copulatory 
  apparatus 
  

   (copulatory 
  bursa, 
  bursal 
  canal, 
  and 
  vagina) 
  is 
  but 
  slightly 
  provided 
  

   with 
  musculature. 
  

  

  Dirfferential 
  diagnosis. 
  — 
  This 
  species 
  differs 
  from 
  other 
  North 
  

   American 
  species 
  of 
  Phagocata 
  in 
  the 
  asymmetrical 
  penis 
  papilla, 
  

   expansion 
  of 
  the 
  terminal 
  part 
  of 
  the 
  bursal 
  canal 
  into 
  a 
  vagina, 
  lack 
  

   of 
  a 
  female 
  antrum, 
  and 
  sharp 
  separation 
  of 
  the 
  vagina 
  from 
  the 
  male 
  

   antrum. 
  

  

  Locality. 
  — 
  Collected 
  by 
  R. 
  C. 
  Hoflmaster 
  in 
  1949 
  and 
  again 
  on 
  

   Jan. 
  19, 
  1951, 
  in 
  Evac 
  Cave 
  near 
  Hillside, 
  Pa. 
  An 
  additional 
  small 
  

   specimen 
  from 
  Conodoguinet 
  Cave 
  in 
  the 
  same 
  region, 
  also 
  collected 
  

   in 
  1949, 
  is 
  presumably 
  the 
  same 
  species 
  although 
  this 
  could 
  not 
  be 
  

   determined 
  with 
  certainty, 
  as 
  the 
  specimen 
  is 
  immature. 
  

  

  Holotype. 
  — 
  One 
  whole 
  mount 
  deposited 
  in 
  the 
  U. 
  S. 
  National 
  

   Museum 
  (USNM 
  24610); 
  also 
  set 
  of 
  transverse 
  sections 
  (4 
  slides) 
  

   and 
  set 
  of 
  sagittal 
  sections 
  (3 
  slides) 
  in 
  this 
  institution. 
  

  

  Remarks. 
  — 
  ^The 
  occurrence 
  of 
  eyes 
  in 
  a 
  cave 
  planarian 
  is 
  always 
  

   unexpected 
  but 
  eyes 
  are 
  present 
  in 
  two 
  other 
  North 
  American 
  cave 
  

   planarians, 
  namely, 
  Phagocata 
  subterranea 
  Hyman, 
  1937, 
  and 
  Soro- 
  

   celis 
  americana 
  Hyman, 
  1939b. 
  Thus 
  both 
  of 
  our 
  cave 
  planarians 
  

   that 
  belong 
  to 
  the 
  genus 
  Phagocata 
  have 
  retained 
  their 
  eyes 
  and 
  this 
  

   may 
  indicate 
  only 
  a 
  moderate 
  degree 
  of 
  adaptation 
  of 
  this 
  genus 
  to 
  

   the 
  cave 
  habitat. 
  It 
  is 
  to 
  be 
  noted, 
  further, 
  that 
  there 
  are 
  white 
  

   epigean 
  species 
  of 
  Phagocata 
  in 
  the 
  United 
  States, 
  so 
  the 
  absence 
  

   of 
  pigment 
  in 
  the 
  cave 
  species 
  of 
  this 
  genus 
  cannot 
  be 
  regarded 
  as 
  

   adaptive. 
  Sorocelis 
  americana 
  often 
  occurs 
  in 
  epigean 
  habitats, 
  so 
  

   its 
  retention 
  of 
  eyes 
  is 
  not 
  surprising. 
  

  

  Family 
  Kenkiidae 
  

  

  Sphalloplana 
  georgiana, 
  new 
  species 
  

  

  Figures 
  65,d; 
  66,6; 
  67,o 
  

  

  Material. 
  — 
  Four 
  specimens 
  presented 
  by 
  C. 
  E. 
  Mohr. 
  

  

  Form. 
  — 
  Elongated, 
  slender 
  but 
  less 
  so 
  than 
  the 
  preceding 
  species; 
  

   narrowed 
  anteriorly 
  with 
  truncate 
  anterior 
  margin 
  bearing 
  a 
  central 
  

   adhesive 
  organ 
  (fig. 
  66, 
  h) 
  ; 
  posterior 
  end 
  bluntly 
  pointed; 
  about 
  8 
  mm. 
  

   long. 
  

  

  (7oZor.— 
  White. 
  

  

  Eyes. 
  — 
  WantiDg. 
  

  

  General 
  structure. 
  — 
  The 
  histological 
  condition 
  of 
  the 
  specimens, 
  

   three 
  of 
  which 
  were 
  sectioned, 
  is 
  very 
  bad. 
  The 
  pharynx 
  appears 
  

   relatively 
  small 
  compared 
  to 
  its 
  size 
  in 
  the 
  preceding 
  species. 
  The 
  

   digestive 
  diverticula 
  are 
  exceedingly 
  numerous 
  and 
  narrow 
  as 
  indi- 
  

  

  