﻿PLATE 
  T. 
  

  

  [Note.— 
  It 
  must 
  be 
  borne 
  iu 
  miud 
  Ihul 
  Ihc 
  ligures 
  of 
  tiie 
  foUowiug 
  platen 
  

   are 
  more 
  or 
  less 
  diagrauiatic, 
  inteuding 
  to 
  bring 
  out 
  prominently 
  things 
  

   Avhich 
  arc 
  seen 
  under 
  the 
  microscope 
  very 
  faint 
  ijy, 
  and 
  at 
  varying 
  foci. 
  

   The 
  vitellus 
  in 
  Figs. 
  7, 
  9, 
  10 
  and 
  11, 
  is 
  eitlier 
  partially 
  or 
  not 
  at 
  all 
  repre- 
  

   sented 
  .] 
  

  

  Fig 
  1 
  — 
  Uninipregnated 
  ovuui;, 
  l"re«lily 
  spawned, 
  (page 
  58,) 
  

   sliowiug 
  the 
  niicroi^yle 
  in 
  the 
  center. 
  

  

  Fig. 
  2- 
  — 
  Profile 
  view 
  of 
  uninipregnated 
  oviini, 
  after 
  being 
  in 
  

   water 
  fur 
  a 
  few 
  moments, 
  (page 
  o9.) 
  Micropyle 
  

   shows 
  as 
  a 
  distinct 
  pit. 
  

  

  Fig. 
  3 
  — 
  Unimjiregnated 
  ovnin, 
  after 
  the 
  formation 
  of 
  the 
  

   "linib," 
  (page 
  CO.) 
  This 
  stage 
  occurs 
  in 
  both 
  

   ntiini})regnated 
  and 
  impregnated 
  ova. 
  

  

  Fig. 
  4— 
  Impregnated 
  ovum, 
  sliowing 
  stage 
  |>receding 
  the 
  

   " 
  limbed 
  " 
  condition, 
  (page 
  G2 
  ) 
  

  

  Fig. 
  5 
  — 
  Cluster 
  of 
  ova, 
  natural 
  size, 
  (page 
  58.) 
  

   Fig. 
  C 
  — 
  Spermatozoa^ 
  (po-Se 
  01 
  ) 
  Enlarged 
  950 
  diametern. 
  

   Three 
  very 
  much 
  more 
  enlarged. 
  

  

  Fig. 
  7 
  — 
  Stage 
  just 
  preceding 
  the 
  formation 
  of 
  the 
  dorsal 
  

  

  1 
  ami 
  are, 
  (page 
  G2.) 
  

   Fig. 
  8 
  — 
  Showing 
  the 
  mucous 
  oval 
  sack, 
  with 
  its 
  stalk, 
  

  

  (page 
  58.) 
  

  

  Figs, 
  y, 
  10 
  and 
  1 
  I 
  — 
  Segmental 
  stages 
  of 
  the 
  ova, 
  (page 
  62.) 
  

  

  