﻿Report 
  U. 
  S. 
  F. 
  C. 
  1 
  897. 
  (To 
  face 
  page 
  1 
  36.) 
  

  

  Plate 
  38. 
  

  

  Jf 
  aud 
  /. 
  Two 
  views 
  of 
  an 
  egg 
  after 
  the 
  blastoderm 
  has 
  spread 
  considerably 
  and 
  the 
  embryonic 
  area 
  e 
  is 
  

   well 
  defined. 
  

  

  A'. 
  View 
  of 
  unhatched 
  embryo, 
  which 
  developed 
  in 
  a 
  temperature 
  of 
  45° 
  F.. 
  proaucmg 
  distortions 
  of 
  tail 
  

   and 
  notochord. 
  

  

  L. 
  An 
  egg-envelope 
  with 
  its 
  contained 
  einliryo, 
  forty-four 
  hours 
  after 
  impregnation, 
  viewed 
  as 
  a 
  trans- 
  

   parent 
  object. 
  

  

  M. 
  An 
  egg-envelope 
  with 
  its 
  contained 
  embryo 
  at 
  the 
  beginning 
  of 
  the 
  third 
  day 
  of 
  development. 
  From 
  

   a 
  photograph. 
  „ 
  ,. 
  ^ 
  ^ 
  ,, 
  x- 
  i 
  • 
  i 
  

  

  X 
  Anterior 
  portion 
  of 
  a 
  young 
  fish 
  on 
  fourth 
  day. 
  To 
  show 
  relations 
  of 
  liver 
  L 
  to 
  yelk 
  I 
  . 
  over 
  which 
  

   the 
  portal 
  vessel 
  ;)i- 
  passes 
  forward 
  to 
  empty 
  into 
  the 
  venous 
  sinus, 
  in 
  common 
  with 
  the 
  anterior 
  ana 
  

   posterior 
  jugulars 
  j' 
  and 
  J, 
  ha 
  bulbiis 
  aorta?, 
  re 
  ventri 
  le. 
  

  

  O. 
  View 
  of 
  fore 
  part 
  of 
  a 
  yomig 
  fish 
  1" 
  days 
  old, 
  from 
  ventral 
  side. 
  

  

  