LIST OF ILLUSTRATIONS 



FIG. 



25- 



26. 

 27. 

 28. 

 29. 



J-'- 



34- 



35- 



36. 



37- 

 38. 

 39- 

 40. 



4>- 



42 



43' 

 44. 



45 

 49- 

 50 



55. 

 56 



59 

 63 

 64, 



65 

 66 



The Thick-lipped Grey Mullet ...... 



The Fifteen-spined or Sea Stickleback .... 



The Common or Ballnn Wrasse ..... 



The Common Pipe-fish ....... 



Diagram of a dissection of a female of the smaller spotted Dog-fish l 

 show the ovary and oviducts (after Milnes Marshall) 



Diagram of a Herring with its body cavity laid open at the lower edge, to 

 show the roes and intestines, &c. ..... 



Diagram of the interior structure of the soft roe or testis in the Herring 



Similar diagram of the hard roe or ovary of the same fish . 



Sperms of various fishes, highly magnified .... 



The abdomen of the female Sole, laid open with the organs in thei 

 natural position ..... 



The same after removal of the liver and gut, the roe seen in its whol 

 length ......'... 



The abdomen of the male Sole laid open with the organs in their natura 

 position ......... 



The same after removal of the liver and gut .... 



Fgg of the larger Spotted Dog-fish, or Nurse-hound (after Day) 



Living Egg of the Herring, magnified .... 



Egg of the Sea-snail [Lipan's) as seen when alive and magnified . 



P^gg of the Double-spotted Sucker {Lcpadogas/cr) 



Egg of a species of Goby, from lower side of stone on shore at Falmouth 



Butter Fish with its mass of spawn (after Holt) ... 



Egg of the Smelt, with its suspending membrane 

 -48. Diagrams of the chief types of floating marine fish-eggs 



A single globule of Noctiluca ...... 



-54. The development of a buoyant marine fish-egg . 



Newly-hatched young (larva) of the Common Black Goby . 



-58. Three stages in the development of the Cod, .showing the transforma 

 tion of the larva into the perfect form .... 



-62. Four stages in the transformation of the Flounder 



The Common Hermit Crab, lying beside the whelk-shell which it inhabit 

 A Swimming Crab ....... 



Ampelisca, a common marine Amphipod .... 



-70. Molluscs which commonly serve as food for fishes 



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103 

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