78 CONTENTS. 



Page. 



fc. Enemies of the white Hah 62 



23. The lake-herring, clupeifonnis 65 



24. The lake-stiirgeon, Acipenser rulicundits 67 



a. Synonomy 67 



b. Characters separating it from other American species 68 



c. Different eharacters in old and young , 69 



d. Description of adnlt specimen 71 



e. Description of yonng specimen 71 



/. Size of mature fish 71 



g. Numbers 72 



h. Economical value 72 



i. Range 73 



j. Food * 73 



k. Habits in the spawning season 1 73 



I. Enemies 74 



25. Slizosi(cliof) amcrkaria, an important species 75 



