382 



Illinois Natural History Survev Bulletin 



Vol. 28, Art. 2 



Topminnow, blackstripe, 325, 352, 354 

 Turbidity, 304, 312. 313, 317, 336 



U 



umbratilis, Notropis, 323, 327, 328, 331, 332, 



336, 338. 343, 345, 367 

 Urbanization. 308, 357; see also Human popu- 

 lation 

 tints, htiohns, 322 



Vegetation ; see also specific names 



aquatic (stream). 304, 313. 315. 317, 320, 336, 



358 

 bank, 304, 312, 313, 336 

 overhanging, 304, 313, 317, 320, 358 



^'clifer. Carplodes, 321, 328, 330, 336, 343, 362 



vcrmkulatus, Esox, 321 



vigtlax, Cliola, 324 



vigilax, Pimephales, 324, 328, 330, 332, 333 



^'olucellus, Notropis, 324, 329 



W 



VVarmouth, 325, 3 57 



Water chemistry, 312, 353, 355; see also Pollu- 

 tion (pollutants) and Polluted waters, 

 chemistry of 



Water levels. 304, 307, 308, 311, 317, 328, 354 



Water (stream) discharge, 308-10; see also 

 Water (stream) flow (volume) 



Water (stream) enrichment, 355-6, 359; see 

 also Pollution (pollutants), Water chem- 

 istry. Sewage 



Water (stream) fertility, 355, 359; see also 

 Water (stream) enrichment. Soil (soil 

 types, soil materials) 



Water (stream) How (volume), 315, 317, 348, 

 3 58; see also Water (stream) discharge 



Water temperature, 312, 317, 346, 353, 354 



Water turbidity; see Turbidity 



Water velocity (current), 304, 312, 314, 317, 

 320, 336, 337 



Water willow, 313 



Weather, 307 



West Branch (of the Salt Fork of the Ver- 

 milion River), 309, 310, 312-3, 345-51, 353, 

 354, 359 



Western mosquitofish, 325 



ivhipplei, Notropis, 324, 329, 336, 343, 367 



ic/iipplii, Notropis, 323. 324, 329 



White crappie, 326, 357 



White sucker, 321, 347, 352, 354 



Willows, 313 



Yellow bass. 325, 3 57 



Yellow bullhead, 324, 347, 357 



zonale, Etheostoma, 327, 329, 336, 345, 374 



