﻿Plate 
  3 
  

  

  Pomatiopsis 
  lapidaria 
  (Say) 
  

  

  1. 
  Side 
  view 
  of 
  animal, 
  X 
  9. 
  (/) 
  = 
  penis 
  or 
  verge; 
  fi 
  = 
  yellow 
  dermal 
  chromatophores, 
  or 
  

  

  "eyebrows.") 
  

  

  2. 
  Dorsal 
  view 
  of 
  animal, 
  X 
  10. 
  (ot^= 
  mucus 
  ducts 
  of 
  pedal 
  gland.) 
  

  

  3. 
  Operculum, 
  X 
  10. 
  (m/ 
  = 
  scar 
  of 
  muscle 
  attachment.) 
  

  

  4. 
  Shell, 
  X 
  12. 
  

  

  5. 
  Gastric 
  sheath, 
  X 
  25. 
  Arrow 
  indicates 
  path 
  of 
  food 
  through 
  stomach. 
  

  

  6. 
  a, 
  Penis 
  of 
  immature 
  male; 
  b-d, 
  variations 
  in 
  penis 
  of 
  mature 
  males. 
  X 
  12. 
  

  

  7. 
  Gross 
  anatomy 
  of 
  male 
  reproductive 
  system, 
  X 
  12. 
  (i/z 
  = 
  digestive 
  gland; 
  pr 
  = 
  pros- 
  

  

  tate 
  gland; 
  sd, 
  sperm 
  duct; 
  st, 
  stomach; 
  te, 
  testes.) 
  

  

  8. 
  Dorsal 
  view 
  of 
  one 
  row 
  of 
  the 
  radula 
  (slightly 
  spread). 
  

  

  9. 
  End 
  view 
  of 
  radula 
  (slightly 
  spread). 
  

  

  68 
  

  

  U. 
  S. 
  GOVERNMENT 
  PRINTING 
  OFFICSi 
  1948 
  

  

  