﻿PLATE 
  VIII. 
  

  

  Figure 
  51. 
  — 
  Egg 
  a 
  few 
  minutes 
  after 
  mixture 
  with 
  the 
  male 
  

   fluid 
  magnified 
  500 
  diameters. 
  

  

  Figure 
  T-S. 
  — 
  Egg 
  about 
  thirty 
  minutes 
  after 
  fertilization 
  

   magnified 
  500 
  diameters. 
  

  

  Figure 
  67. 
  — 
  Section 
  of 
  a 
  portion 
  of 
  the 
  visceral 
  mass 
  of 
  a 
  

   male 
  oyster 
  magnified 
  250 
  diameters. 
  The 
  surface 
  epithelium 
  

   of 
  the 
  body 
  is 
  shown 
  at 
  the 
  lower 
  end 
  of 
  the 
  figure. 
  Above 
  

   this 
  is 
  a 
  loose, 
  thick 
  layer 
  of 
  wrinkled 
  cells, 
  which 
  have 
  the 
  

   appearance 
  of 
  adipose 
  cells 
  from 
  which 
  all 
  the 
  fat 
  has 
  been 
  

   removed. 
  Above 
  this 
  layer 
  is 
  a 
  large 
  duct, 
  lined 
  with 
  epithe- 
  

   lial 
  cells, 
  and 
  filled 
  with 
  ripe 
  spermatozoa, 
  which 
  have 
  been 
  

   poured 
  into 
  it 
  from 
  two 
  follicles 
  which 
  communicate 
  with 
  it 
  

   on 
  each 
  side. 
  Above 
  this 
  are 
  sections 
  of 
  a 
  number 
  of 
  the 
  fol- 
  

   licles 
  of 
  the 
  testis, 
  in 
  three 
  of 
  which 
  the 
  contents 
  are 
  figured 
  

  

  