167 



Sea," p. 168, assures us that in England, the herring 

 spawns and breeds in salt water, and twice in the year. 

 This is not the case in America. We are supposed to 

 have a herring that belongs entirely to the fresh water, 

 but the identity of which is not quite established, but our 

 common herring is migratory in its character, like the 

 shad. Since the shad was introduced into the rivers 

 emptying into Lake Ontario, the hei'ring seems to have 

 appeared there having been seen quite frequently in the 

 spring of 1878 along the shores of the lake and in the 

 streams flowing into it, having entered them apparently 

 for the purpose of spawning. 



CHAPTER XIII. 



BLACK BASS AND OTHER FISH. 



We now come to the consideration of other species of 

 fish that need entirely different treatment. Most of 

 them are rarely cultivated on the purely artificial plan 

 in consequence of peculiarities of their habits or of their 

 ova. The fish of which we have already treated have 

 eggs that are loose in the uterine sacs when ripe, and 

 are comparatively free from mucous when emitted. The 

 eggs of the trout adhere at first to whatever they touch, 

 and those of the whitefish need a- little agitation for a 

 time; but these qualities do not interfere with their 

 management in troughs or on screens. On the other 

 hand the black bass, the carp and their cognate varieties 

 have eggs that are either surrounded with a glutinous 

 fluid or attach themselves at once and permanently to 

 whatever they touch. Some ot them can be rendered 

 free by agitation of the water, which is readily effected 



