CLASS TELEOSTEI. 



97 



Cards' si us aurd'tus. Gold-fish. 



ORDER EVENTOGNATHI (e ven to na'thl). 



The Gold-fish, origi- PIG. m. 



nally from China, and 

 of a greenish hue, has 

 become a common pet 

 of the parlor and fount- 

 ain,* and through do- 

 mestication changes to 

 a golden yellow, but 

 constantly tends to re- 

 vert to its native color. 

 The Silver-fish is only 

 a variety of the Gold, 

 resulting from artificial treatment in aquaria. 



ORDER ISOSPONDYLI (T SO spon'di IT). 



The Alewife, or Herring, ascends fresh-water streams 



to spawn, thus coming each 

 spring from the depths of 

 the ocean to the hand of 

 man. Immense schools go 

 up the streams in which 

 they were spawned the pre- 

 vious year, and always select the branches leading to 

 certain head-waters, for which they have a preference. 



The Salmon has habits similar to those of the Herring, 

 but, on account of its greater size, is able to ascend water- 

 falls ten or twelve feet in height. Upon arrival at the 

 spawning-ground, a hole is scooped in the gravel, and 

 the eggs deposited and covered over, the parent then 



FIG J66 



Olu'pea verna'lis. Herring. ( T ' 5 .) 



* Gold-fish should be fed once a week with some animal food, aa worms, and 

 more frequently with a stiff dough of flour and water. 



