THE GOLDFISH AND ITS CULTURE. 71 



in these pages only the leading and more desirable ones need be 

 mentioned, the list being arranged according to their relative value 

 as oxygenators. For use during the winter season, we select all or 

 part of the following varieties : 



Myriophyllum spicatum. Sagittaria natans. 



Ludvvigia Floridae. Ceratophyllum rossea. 



Cabomba viridis. 



Either one of these, grown as a single specimen, if of sufficient 

 size, will do the work of aerating the water during the colder season. 



AQUARIUM. 



If the tank is of a sufficiently large size, specimens of all of them may 

 be introduced, and as all bear differently shaped and colored foliage, 

 they will greatly enhance the attractive appearance of the aquarium. 

 For the summer season we may make our. choice from the following: 



Ceratophyllum demersum. Ceratophyllum rosaea. 



Anacharis canadensis. Vallesneria spiralis. 



Sagittaria natans. Potomogeton crispus. 



Potomogeton pussilus. Cabomba rosaefolia. 



In both seasons we can add to the aquatics named, various kinds 

 of marsh plants and those aquatics that float upon the surface, all of 

 which add to the ornamental beauty of the collection. It may be 

 mentioned that the plants put in a vessel containing fish are not 

 placed there for the fish to eat, as many suppose. Some fish, how- 



