﻿ANATOMY 
  AND 
  AFFINITIES 
  OF 
  THE 
  TROCHID^. 
  77 
  

  

  Fig. 
  15. 
  — 
  Kadula 
  of 
  T. 
  magus; 
  portion 
  of 
  a 
  single 
  transverse 
  row 
  of 
  

   teetli. 
  X 
  75. 
  

  

  Figs. 
  1(3 
  and 
  17. 
  — 
  lladulii 
  of 
  T. 
  magus 
  ; 
  marginal 
  teeth. 
  X 
  75. 
  

  

  Fig. 
  is. 
  — 
  Radiila 
  of 
  T. 
  tumidus; 
  [)ortiou 
  of 
  a 
  transverse 
  row 
  of 
  teetli. 
  

   X 
  250. 
  

  

  PLATE 
  5. 
  

  

  I'iG. 
  19. 
  — 
  Kadula 
  of 
  Troclius 
  lineatus 
  ; 
  portion 
  of 
  a 
  transverse 
  row 
  of 
  

   teetli. 
  X 
  75. 
  

  

  I'iG. 
  20. 
  — 
  Eadula 
  of 
  T. 
  zizypliinus; 
  part 
  of 
  a 
  transverse 
  row 
  of 
  teetli. 
  

   X 
  75. 
  

  

  Fig. 
  21. 
  — 
  Kadula 
  of 
  T. 
  granulatus; 
  part 
  of 
  a 
  transverse 
  row 
  of 
  teeth. 
  

   X 
  75. 
  

  

  Figs. 
  22 
  — 
  24. 
  — 
  Marginal 
  teeth 
  of 
  T. 
  zizypliinus. 
  X 
  75. 
  

  

  Fig. 
  25. 
  — 
  Marginal 
  tooth 
  of 
  T, 
  granulatus. 
  x 
  7o. 
  

  

  Fig. 
  20. 
  — 
  Marginal 
  tooth 
  of 
  T. 
  zizyphinus. 
  X 
  75. 
  

  

  Fig. 
  27. 
  — 
  Flabelliform 
  teeth 
  of 
  T. 
  zizypliinus. 
  x 
  75. 
  

  

  Fig. 
  28. 
  — 
  Radula 
  of 
  T. 
  striatus; 
  part 
  of 
  a 
  transverse 
  row 
  of 
  teeth. 
  

   X 
  250. 
  

  

  Fig. 
  29. 
  — 
  Radula 
  of 
  T. 
  exasperatus; 
  part 
  of 
  a 
  transverse 
  row 
  of 
  teetb. 
  

   X 
  250. 
  

  

  Fig. 
  30. 
  — 
  Diagram 
  of 
  the 
  nervous 
  system 
  of 
  T. 
  cinerarius, 
  viewed 
  from 
  

   above. 
  

  

  Fig. 
  31. 
  — 
  Transverse 
  section 
  through 
  the 
  anterior 
  portion 
  of 
  the 
  ventral 
  

   (pedal) 
  nerve-cord 
  of 
  T. 
  cinerarius 
  (right 
  side). 
  X 
  75. 
  

  

  F'iG. 
  32. 
  — 
  Transverse 
  section 
  through 
  tlie 
  middle 
  region 
  of 
  the 
  pedal 
  nerve- 
  

   cords 
  of 
  T. 
  umbilicatus, 
  passing 
  through 
  the 
  anterior 
  epipodial 
  nerve. 
  X75. 
  

  

  Fig. 
  33. 
  — 
  Transverse 
  section 
  through 
  the 
  anterior 
  region 
  of 
  the 
  pedal 
  nerve- 
  

   cords 
  of 
  Trochus. 
  X 
  75. 
  

  

  Fig. 
  31. 
  — 
  Longitudinal 
  section 
  through 
  the 
  papillary 
  sac 
  and 
  left 
  reno- 
  

   pericardial 
  canal 
  of 
  T. 
  magus 
  (semi-diagrammatic). 
  x 
  12. 
  

  

  Fig. 
  35. 
  — 
  Section 
  (oblique) 
  through 
  the 
  pericardium 
  and 
  kidneys 
  of 
  

   T. 
  magus, 
  showing 
  the 
  right 
  reno-pericardial 
  pore 
  and 
  the 
  genital 
  duct. 
  

   X 
  15. 
  

  

  Fig. 
  3G. 
  — 
  Section 
  (oblique) 
  through 
  the 
  pericardium 
  and 
  kidneys 
  of 
  

   T. 
  magus, 
  showing 
  the 
  genital 
  duct 
  (oviduct) 
  opening 
  on 
  a 
  small 
  papilla 
  into 
  

   liie 
  ureter 
  (or 
  right 
  kidney-chamber), 
  x 
  15. 
  

  

  Fig. 
  37. 
  — 
  Section 
  through 
  the 
  right 
  kidney 
  of 
  T. 
  magus. 
  X 
  400. 
  

  

  Fig. 
  38.— 
  Section 
  ihrougb 
  part 
  of 
  the 
  left 
  auricle 
  of 
  T. 
  magus, 
  passing 
  

   through 
  the 
  pericardial 
  gland, 
  x 
  350. 
  

  

  