4 CONTENTS. 



(the Elassomos), 47. — Family Aphredoderidfc (the Pirate 

 Perches), 48. — Family SciconidLe (the Maigres), 50. — Family 

 Cottid;e (the Sculpins), 50. — Suh-ordcr Anacanthini, 51. — Fam- 

 ily Gadidie (the Cod-fishes), 51. — Sub-order Hemibranchii, 51. — 

 Family Gasterosteidse (the Sticklebacks), 51. — Sub-order Per- 

 cesoces, 51. — Family Atherinidse (the Silversides), 51. — Sub-order 

 Haplomi, 51. — Family Cyprinodontidse (the Toothed Minnows). 

 51.— Family Umbridte (the Mud Minnows), 52. — Family Eso- 

 cidas (the Pikes), 52. — Family Amblyopsidae (the Blind Fishes), 

 53. — Sub-order TsospondijU, 53. — Family Percopsidae (the Trout 

 Perches), 53. — Family Salmonidte (the Salmon) 54. — Family Hy- 

 odontidas (the Moon-eyes), 54. — Family Dorosomatidse (the Giz- 

 zard Shad), 55. — Family Clupeidse (the Herrings), 55. — Sub- 

 order EventognatM, 55. — Family Cyprinidte (the Minnows), 55. 

 —Family Catostomidge (the Suckers), 63. — Order Nematognathi, 

 66. — Family Siluridae (the Cat-fishes), 66. — Order Apodes, 68. — 

 Family Anguillidte (the Eels), 68. — Sub-class Ganoidei, 68. — 

 Order Ci/cloganoidei, 68. — Family Amiidse (the Bow-fins), 68. — 

 Order Rliomhoganoidei, 68. — Family Lepidosteidse (the Gar- 

 pikes), 68. — Order Selacliostomi, 69. — Family Polyodontidae (the 

 Spoonbills), 69. — Order Chondrostei, 69. — Family Acipenseridse 

 (the Sturgeons), 69. — Class Marsipobranckii, 70. — Order Hyper- 

 oartia, 70. — Family Petromyzontidte (the Lampreys), 70. 



The Food op Illinois Fishes . . . . .71 



Purposes of the Investigation, 71. — Methods, 73. — Results, 74. — Details 



of Food, 74, — Recapitulation, 83. 

 Appendix. On the Crustacea Eaten by Fishes . . .87 



Description of a New Species of Asellus. . . 90 



BULLETIN No. 3. 



Studies of the Food of Birds, Insects, and Fishes, made at the 

 Illinois State Laboratory of Natural History, at 

 Normal, Illinois .... 1 



Introduction . . . . . .2 



On Some Interactions of Organisms ... 3 



The Food op Fishes . . . . .18 



Order TeleocepJiaU, 21. — Sub-order Acanthopteri, 21. — Family Etheos- 

 tomatidte (the Darters), 22.— Details of the Food of the Etheos- 

 tomatidffi, 27.— Family Percidte (the Perches), 28.— Table of the 

 Food of the Percidte, 35.— Family Labracidie (the Bass), 36.— 

 Family Centrarchidte (the Sun-fishes), 38.— Table of the Food of 

 Micropterus, 43.— Table of the Food of Ambloplites and Chteno- 

 bryttus, 45.— Table of the Food of Apomotis and Lepiopomus, 

 51.— Table of the Food of Eupomotis and Centrarchus, 55.— Table 

 of the Food of Pomoxys, 60.— Table of the Food of Young Cen- 

 trarchidte, 62.— Table of the Food of Adult Centrarchidte, 63. 

 On the Food of Young Fishes . . , .66 



Introduction, 66.— Acanthopteri, 67.— Esoscidte, 68.— ClupeidsB, 68.— 

 Cyprinidtu, 70.— Catostomidie, 70.— Siluridte, 74.— Amiidie, 75. 



