1Y FISHES OF ILLINOIS 



PAGE 



The Wabash System ...................................... 1* 



Wabash River ......................................... ? 



Vermilion River ...................................... 



Little Vermilion River ................................ 



Embarras River ......... . ............................ lxiv 



Little Wabash River .................................. Ixv 



Saline River System ............... ....................... Ixvi 



Cache River ............................................. Ixvin 



Big Bay Creek ........................................... Ifix 



The Lake Michigan Drainage .............................. 



On the General and Interior Distribution of Illinois Fishes ......... Ixxii 



The General Distribution ................................... Ixxiv 



The Interior Distribution .................................... Ixxxiii 



The Illinois Basin and the other Districts compared ........... xci 



Relations of each District to all the others ................... xcviii 



The Fishes of Northern, Central, and Southern Illinois ........ c 



Use of Locality Maps ................................. cnl 



Peculiarities of Distribution in the Lower Illinoisan Glaciation . civ 



Classification and Use of Ecological Data ....... ............. cyii 



Fishes of the Ohio and of the Mississippi Drainage. . . . cviii 



Boundary between Northern and Southern Species ............ ex 



General Features of Ecological Distribution .................. cxi 



Ecological Table .......................................... cxiv 



General Summary .......................................... cxix 



The Fisheries of Illinois .......................... ............. cxxiii 



Explanation of Terms used ..................................... cxxviii 



Glossary of Technical Terms ................................... cxxxi 



Key to the Families of Illinois Fishes ........................... 



Class Marsipobranchii ........................................ 5 



Order Hyperoartii ........................... ............... 5 



Family Petromyzonidse. Lampreys .................. . ...... 5 



Genus Ichthyomyzon Girard ............................. 



I. concolor (Kirtland). Silvery Lamprey ................ 9 



Genus Lampetra Gray ............. ..................... 11 



L. wilderi Gage. Brook Lamprey ...................... 11 



I) Class Pisces .................................................. 13 



15 



amily Polyodontidse. Paddle-fishes ........................ 



Genus Polyodon Lace"pde ............................... 16 



P. spathula (Walbaum). Paddle-fish ................... 16 



^rder.Clioiidrostel. . ............. ........................... 



Family Acipenseridse. Sturgeons ........................... 



Genus Acipenser Linnaeus ............................... 



A. rubicundus Le Sueur. Lake Sturgeon ................ 24 



Genus Scaphirhynchus Heckel ............................ 



S. platorhynchus (Rafinesque). Shovel-nosed Sturgeon ..... 27 



Genus Parascaphirhynchus Forbes & Richardson ........... 28 



P. albus Forbes & Richardson. White Sturgeon .......... 



_QrderJRhombpganoidfia ..................................... 



Family Lepisosteidae. Garpikes ............................ 30 



