Viii CONTENTS. 



ARTICLE VIII. 



ON THE FOOD RELATIONS OF FRESH- WATER FISHES: 



A SUMMARY AND DISCUSSION. By S. A. Forbes 475 



The Food of Adult Fishes 478 



Piscivorous Fishes, 478.— Mollusk Eaters, 480.— Insectivorous 

 Species, 482. — The Crustacean Element, 485. — Vermes as 

 Food for Fishes, 488.— Sponges and Protozoa, 489.— Scav- 

 engers, 490.— Vegetable Feeders, 490.— Mud-Eating Fishes, 

 491. 



Summary of the Food of the Young 492 



On the Definiteness and Permanency of the Food Habits 



OF Fishes 497 



The Structures of Alimentation 504 



Correlations of Alimentary Organs 508 



Detailed Recapitulation of Data 510 



