IV FISHES OF ILLINOIS 



PAGE 



The Wabash System Ivi 



Wabash River Ivii 



VeiTnihon River Iviii 



Little VermiHon River Hx 



Embarras River hx 



Little Wabash River Ix 



Saline River System Ixii 



Cache River Ixiii 



Big Bay Creek Ixiv 



The Lake Michigan Drainage Ixv 



On the General and Interior Distribution of Illinois Fishes Ixvii 



The General Distribution Ixviii 



The Interior Distribution Ixxviii 



The Illinois Basin and the other Districts compared Ixxxvi 



Relations of each District to all the others xciii 



The Fishes of Northern, Central, and Southern Illinois xcv 



Use of Locality Maps xcviii 



Peculiarities of Distribution in the Lower Illinoisan Glaciation xcix 



Classification and Use of Ecological Data cii 



Fishes of the Ohio and of the Mississippi Drainage ciii 



Boundary between Northern and Southern Species cv 



General Features of Ecological Distribution cv 



Ecological Table cix 



General Summary cxiv 



Maps I. -CI II., preceded by list. 



The Fisheries of Illinois cxvii 



Explanation of Terms used cxxii 



Glossary of Technical Terms cxxv 



Key to the Families of Illinois Fishes 1 



Class Marsipobranchii 5 



Order Hyperoartii 5 



Family Petromyzonidse. Lampreys 5 



Genus Ichthyomyzon Girard 9 



I. concolor (Kirtland). Silvery Lamprey 9 



Genus Lampetra Gray 11 



L. wilderi Gage. Brook Lam,prey 11 



Class Pisces 13 



Order Selachostomi 15 



Family Polyodontidag. Paddle -fishes IS 



Genus Polyodon Lacepede 16 



P. spathula (Walbaum). Paddle-fish 16 



Order Chondrostei 21 



Family Acipenseridae. Sturgeons 21 



Genus Acipenser Linnaeus 24 



A. rubicundus Le Sueur. Lake Sturgeon 24 



Genus Scaphirhynchus Heckel 26 



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



Genus Parascaphirhynchus Forbes & Richardson 28 



P. albus Forbes & Richardson. White Sturgeon 28 



Order Rhomboganoidea 30 



Family Lepisosteidse. Garpikes 30 



