﻿76 
  W. 
  B. 
  KANDLKS. 
  

  

  e. 
  r. 
  V. 
  Eifereiit 
  renal 
  vein 
  of 
  right 
  kidney, 
  ep. 
  EpipoJium. 
  eji. 
  c. 
  Cervical 
  

   lobe 
  of 
  epipodium. 
  ep. 
  n. 
  Epipodial 
  nerve, 
  ep. 
  p. 
  Epipodial 
  papilla, 
  ep. 
  t. 
  

   Epipodial 
  tentacles. 
  /.Foot. 
  f.c. 
  Eormative 
  (chitogenous) 
  cells 
  of 
  tesserae. 
  

   g. 
  Gill. 
  g. 
  a. 
  Genital 
  aperture, 
  g. 
  d. 
  Genital 
  duct. 
  g. 
  g. 
  Genital 
  gland. 
  

   int. 
  Intestine, 
  j. 
  Jaw. 
  k. 
  c. 
  Kidney 
  chamber 
  (right). 
  /. 
  Liver. 
  /. 
  uu. 
  

   Left 
  auricle. 
  /. 
  c. 
  Labial 
  commissure. 
  /. 
  k. 
  Left 
  kidney 
  (papillary 
  sac). 
  

   l.k.a. 
  Left 
  renal 
  aperture, 
  m. 
  Mouth, 
  m.f. 
  Muscle-fibres, 
  m.g. 
  Mucous 
  

   (hypobranchial) 
  gland, 
  m. 
  ins. 
  Muscle 
  insertion. 
  ma. 
  Mantle, 
  ma. 
  c. 
  

   Mantle-cavity, 
  o. 
  m. 
  Outer 
  limiting 
  membrane 
  of 
  jaw. 
  o. 
  n. 
  Optic 
  nerve. 
  

   oc.p. 
  Ocular 
  peduncle, 
  od. 
  Odontophore. 
  ce. 
  ffisopliagus. 
  op. 
  I. 
  Opercular 
  

   lobe. 
  OS. 
  Osphradium. 
  ot. 
  Otocyst. 
  ol. 
  n. 
  Octocyst 
  nerve, 
  ovd. 
  Oviduct. 
  

   p. 
  ao. 
  Posterior 
  aorta, 
  p. 
  gl. 
  Pedal 
  gland, 
  p. 
  n. 
  Pedal 
  nerve, 
  p. 
  r. 
  k. 
  

   Posterior 
  lobe 
  of 
  right 
  kidney, 
  pa. 
  n. 
  Pallial 
  nerve 
  (right), 
  pa. 
  n.' 
  Pallial 
  

   nerve 
  (left), 
  pc. 
  Pericardium, 
  pd. 
  c. 
  Pedal 
  cords, 
  pi. 
  g 
  Pleural 
  ganglion. 
  

   pi. 
  p. 
  Pleuro-pedal 
  connective, 
  r. 
  Rectum, 
  r. 
  uu. 
  Right 
  auricle. 
  ;•. 
  k. 
  

   Right 
  kidney, 
  r. 
  Ic. 
  a. 
  Right 
  kidney 
  aperture, 
  r. 
  p. 
  c. 
  Reno-pericardial 
  

   canal 
  (right). 
  r.' 
  ji. 
  c. 
  Reno-pericardial 
  canal 
  (left). 
  r. 
  s. 
  Radula-sac. 
  

   sb. 
  int. 
  Subintestinal 
  nerve, 
  si. 
  g. 
  Salivary 
  gland, 
  sp. 
  c. 
  Spiral 
  caecum. 
  

   sp. 
  int. 
  Supra-intestinal 
  nerve, 
  st. 
  Stomach, 
  t. 
  n. 
  Tentacular 
  nerve. 
  I. 
  p. 
  v. 
  

   Transverse 
  pallial 
  vein, 
  ts. 
  Tessera; 
  of 
  jaw. 
  a. 
  Ureter, 
  um. 
  Umbilicus. 
  

   V. 
  Ventricle, 
  v. 
  n. 
  Visceral 
  nerve. 
  

  

  PLA.TE 
  4. 
  

  

  Fig. 
  1. 
  — 
  Shell 
  of 
  Trochus 
  magus. 
  

  

  Fig. 
  2.— 
  Shell 
  of 
  T. 
  umbilicatus. 
  

  

  Fig. 
  3.— 
  Shell 
  of 
  T. 
  li 
  neat 
  us. 
  

  

  Fig, 
  4. 
  — 
  Shell 
  of 
  T. 
  zizyphinus. 
  

  

  Fig. 
  5. 
  — 
  Head 
  of 
  T. 
  umbilicatus, 
  viewed 
  from 
  the 
  right 
  side, 
  x 
  5. 
  

  

  Fig. 
  6. 
  — 
  Head 
  and 
  foot 
  of 
  T. 
  granulatus, 
  viewed 
  from 
  the 
  left 
  side. 
  The 
  

   ^interior 
  part 
  of 
  the 
  foot 
  is 
  represented 
  in 
  section 
  to 
  exhibit 
  the 
  pedal 
  gland. 
  

   X 
  2i 
  

  

  i'lG. 
  7. 
  — 
  Trochus 
  lineatus, 
  viewed 
  from 
  the 
  ventral 
  surface. 
  X 
  'l\. 
  

  

  Fig. 
  8. 
  — 
  Foot 
  of 
  T. 
  granulatus, 
  seen 
  from 
  the 
  dorsal 
  surface, 
  x 
  3. 
  

  

  Fig. 
  9. 
  — 
  Dorsal 
  surface 
  of 
  the 
  foot 
  of 
  T. 
  magus. 
  X 
  2. 
  

  

  Fig. 
  10. 
  — 
  Operculum 
  of 
  T. 
  magus, 
  x 
  3^. 
  

  

  Fig. 
  11. 
  — 
  Operculum 
  of 
  T. 
  zizyphinus. 
  x 
  4. 
  

  

  Fig. 
  12. 
  — 
  Jaws 
  of 
  T. 
  zizyphinus. 
  x 
  12. 
  

  

  Fig, 
  13, 
  — 
  Jaws 
  of 
  T, 
  magus, 
  x 
  25, 
  

  

  Fig. 
  14. 
  — 
  Transverse 
  section 
  of 
  the 
  jaw 
  of 
  T. 
  zizyphinus. 
  x 
  250. 
  

  

  