ILLUSTRATIONS. 



Group of Japanese Goldfish, 



The Telescope, 



The Fringe-tail, 



Longitudinal Section of a Pond, 



The Outlet Pipe, 



Diagram of the Author's Establishment, 



Anatomical Sketch of the Goldfish, 



Scale from the Lateral Line, 



The Fertilization of the Fish Egg, 



The Head of the Male in Breeding Season, 



The Aquarium, 



The Shipping Can, 



The Water Asell, 



The Water Flea, . 



The Boat Fly, 



The Yellow-banded Water Beetle, 



The Larva of Same,. 



The Black Water-beetle, 



The Dragon-fly, 



The Larva of Same, 



