4 
CONTENTS. 
(the Elassomes), 47. — Family Aphredoderidse (the Pirate 
Perches), 48. — Family Sciamidoe (the Maigres), 50. — Family 
Cottidse (the Sculpins), 50. — Sub-order Anacanthini, 51. — Fam- 
ily Gadidae (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, M. — Family Cyprinodontidse (the Toothed Minnows), 
51. — Family Umbridse (the Mud Minnows), 52. — Family Eso- 
cidse (the Pikes), 52. — Family Amblyopsidse (the Blind Fishes), 
53. — Sub-order Isospondyli, 53. — Family Percopsidie (the Trout 
Perches), 53. — Family Salmonid8e(the Salmon) 54. — Family Hy- 
odontidse (the Moon-eyes), 54. — Family Dorosomatidse (the Giz- 
zard Shad), 55. — Family Clupeidse (the Herrings), 55. — Sub- 
order Eventognathi, 55. — Family Cyprinidse (the Minnows), 55. 
—Family Catostomidce (the Suckers), 63. — Order Nematognathi, 
66. — Family Siluridse (the Cat-fishes), 66. — Order Apodes, 68. — 
Family Anguillidse (the Eels), 68. — Sub-class Ganoidei, 68. — 
Order Cycloganoidei, 68. — Family AmiidsB (the Bow-fins), 68. — 
Order Rhoniboganoidei , 68. — Family Lepidosteidse (the Gar- 
pikes), 68. — Order Selachostomi, 69. — Family Polyodontidse (the 
Spoonbills), 69. — Order Chondrostei , 69. — Family Acipenseridse 
(the Sturgeons), 69. — Class Marsipobranchii, 70. — Order Hyper- 
oartia, 70. — Family Petromyzontidse (the Lampreys), 70. 
The Food of 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 of Fishes . . . . . .18 
Order Teleocephali , 21. — Sub-order Acanthopteri, 21.— Family Etheos- 
tomatidie (the Darters), 22. — Details of the Food of the Etheos- 
tomatidie, 27. — Family Percida? (the Perches), 28. — Table of the 
Food of the Percidie, 35. — Family Labracida5 (the Bass), 36. — 
Family Centrarchidie (the Sun-fishes), 38. — Table of the Food of 
Micropterus, 43. — Table of the Food of Ambloplites and Chseno- 
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- 
trarchidie, 62. — Table of the Food of Adult Centrarchidie, 63. 
On the Food of Y.oung Fishes .... -60" 
Introduction, 66. — Acanthopteri, 67. — Esoseidiu, 68. — Clupeidm, 68. — 
Cyprinidiu, 70. — Catostomidiu, 70. — Siluridiu, 74. — Ami id a 1 , 75. 
