ILLUSTRATIONS. 



Group of Japanese Goldfish, . . . Colored Frontispiece. 



The Telescope, . .. . . . . 15 



The Fringe-tail, . . . . . . *7 



Longitudinal Section of a Pond, 33 



The Outlet Pipe, . . . . -34 



Diagram of the 'Author's Establishment, ... 36 



Anatomical Sketch of the Goldfish, . . . -45 



Scale from the Lateral Line, .... 46 



The Fertilization of the Fish Egg, . . . .50 



The Head of the Male in Breeding Season, f . . 54 



The Aquarium, . . . . 71 



The Shipping Can, ..... 77 



The Water Asell, . . . . . .84 



The Water Flea, ../.... 84 



The Boat Fly, . . . . . -85 



The Yellow-banded Water Beetle, .... 86 



The Larva of Same,. . . . . . .86 



The Black Water-beetle, ..... 87 



The Dragon-fly, . . . ... .89 



The Larva of Same, . . . . . 85 



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