sioiial in the Wabasli River; sporadic in the lower Mis- 

 sissippi River and lower reaches of its major tributaries. 



Not/niis gyriniis (Mitchill) — tadpole madtom. Gen- 

 erally distributed throughout the state. 



Noinnis miiirns Jordan — brindled madtom. Generally 

 distributed in the upper Wabash drainage system; sporadic 

 in the lower Wabash and Ohio drainage systems. 



Noliirus noctiirniis Jordan &: Gilbert — freckled madtom. 

 Generally distributed in the Kaskaskia River; sporadic else- 

 where in the southern two-thirds of the state. 



Noturus species — undescribed madtom. Known from 

 the lower Vermilion River in Vermilion County and the 

 Wabash River in Wabash County. 



P^lodictis oliiarh (Rafinesque) — Hathead catfish. Oc- 

 casional in large and medium-sized streams throughout 

 Illinois, except the northeastern part. 



Percopsidae — trout-perches 



Percopsis omiscomaycns ( Walbaum ) — trout-perch. Oc- 

 casional in Lake Michigan and the middle Illinois River; 

 sporadic in the Mississippi River and its lesser tributaries. 



Aphredoderidae — pirate perches 



Aphrednderiii sayaiuis (Gilliams; — pirate perch. Gen- 

 erally distributed throughout the southern part of Illinois; 

 occasional in the east-central counties; sporadic in northern 

 and central Illinois. 



Amblyopsidae — cavefishes 

 Chologaster agassizi Putnam — spring cavefish. Known at 

 present only from springs in northwestern Union County. 



Gadidae — codfishes 



Loia lota (Linnaeus) — burbot. Occasional in Lake 

 Michigan; sporadic in the Mississippi and Illinois rivers 

 and lower reaches of their major tribtitaries. 



Cyprinodontidae — topminnows 



rnndidui diaphanus menomi Jordan & Copeland — 

 banded killifish. Occasional in lakes of Lake and McHenry 

 counties. notti 



Fuiididiis dip^ dispar { Agassiz ; — northern starhcad 

 topminnow. Sporadic in northeastern Illinois, the middle 

 Illinois River valley, and swamps in northwestern Union 

 County. 



Fiindului notatus (Rafinesque; — blackstripe topmin- 

 now. Generally distributed throughout the southern three- 

 fourths of the state, except for the upland streams in the 

 Shawnee Hills of southern Illinois; occasional in the north- 

 ern fourth of the state. 



Fundulus olivace/is ( Storer ) — blackspotted topminnow. 

 Generally distributed throughout the Shawnee Hills of 

 southern Illinois; occasional in the bordering coiuuics north 

 of the Shawnee Hills. 



Poeciiiidae — livebearers 



Cuimhiuni ajjiiiii iiljiiiit ( Baird & Girard ) — mosquito- 

 fish Generally distributed throughout the southern third 



of the state; occasion.il in tlic- lower and middle Illinois 

 River valley; sporadic elsewhere through introductions. 



Atherinidae — silversides 



Ltihideflhe.! sicct/lus (Cope; — brook silverside. Occa- 

 sional throughout the state. 



Gasterosteidae — sticklebacks 



Culaea ill c mist iDis ( Kirtland ) — brook stickleback. Gen- 

 erally distributed in small streams throughout most ;)f the 

 northern fourth of the state. 



Piingitins pungitiin (Linnaeus) — ninespine stickleback. 

 Occasional along the shore of Lake Michigan. 



Serranidae — sea basses 



Roccus chrysups (Rafinesque) — white bass. Generally 

 distributed in the Mississippi, Illinois, and Ohio rivers and 

 lower reaches of their major tributaries; sporadic in other 

 large and medium-sized rivers. 



Rnccus mississippiensis (Jordan & Eigenmann) — yel- 

 low bass. Sporadic throughout the state; occasional in 

 artificial lakes, where it has been introduced. 



Centrarchidae — sunfishes 



Ambloplites rupestris rupestris (Rafinesque) — nortliern 

 rock bass. Generally distributed in the northern, central, 

 and eastern parts of Illinois; occasional in western Illinois 

 but sporadic west of the Illinois River and throughout the 

 southern half of the state. 



Centrarchus niacropterus ( Lacepede ) — flier. Generally 

 distributed in swamps and sluggish streams in the southern 

 fourth of the state. 



Chaenobryttus gulosus (Cuvier) — warmouth. Occasion- 

 al throughout the state. 



Elanomci zonatiim Jordan — banded pygmy sunfish. Pres- 

 sently known only from swamps in northwestern Union 

 County. 



Lepomis cyanelltis Rafinesque — green sunfish. Gener- 

 ally distributed in creeks throughout the state. 



Lepomis gibhou/s (Linnaeus) — piunpkinseed. Occa- 

 sional throughout the northern third of the s'ate; sporadic 

 in the middle Illinois River valley. 



Lepotnis hi/milis (Girard) — orangespotted sunfish. Oc- 

 casional throughout the state. 



Lepomis macrochirus macrnchiriis Rafinesque — northern 

 bluegill. Generally distributed throughout the state. 



Lepomis megdotis (Rafinesque) subspecies — longear 

 sunfish. Generally distributed througlimu the southern third 

 of the state and the Wabash drainage system; sporadic in 

 the Illinois River valley and in northeastern Illinois. 



Lepomis tnicrolopbiis (Ciiinther) — red-ear sunfish. Spo- 

 radic in the southern and central parts of the state; all 

 populations, except those in the extreme southern tip of 

 Illinois, the result of introduction. 



Lepomis punctaliis miiiiatiis ( Jordan ) — western spotted 

 sunfish. Sporadic in the Illinois River valley. 



Lepomis s^mmetricns Forbes — bantam sunfish. Present- 

 ly known only from swamps in northwestern Union Coimty. 



