﻿552 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [64] 
  

  

  EXPLANATION 
  OF 
  PLATE 
  IV. 
  

  

  Siphostoma 
  fuscum. 
  (The 
  Pipe-fish.) 
  

  

  Fig. 
  19. 
  A 
  young 
  embryo, 
  in 
  which 
  the 
  tail 
  is 
  still 
  archicercal 
  and 
  the 
  dorsal 
  and 
  pec- 
  

   toral 
  fins 
  are 
  just 
  developing. 
  

   Fig. 
  20. 
  A 
  still 
  younger 
  stage, 
  in 
  which 
  the 
  tail 
  is 
  just 
  beginning 
  to 
  grow 
  out. 
  

   Fig. 
  21. 
  An 
  older 
  stage, 
  in 
  which 
  the 
  caudal 
  fin 
  is 
  beginning 
  to 
  be 
  formed. 
  

  

  