536 Illinois State Laboratory of Natural History. 



Wolffia: 1 Lepomis pallidus, yg.; 1 Aphredoderus sayanus, 

 Sept. ; 7 Umbra limi, Sept. ; 4 Gambusia patruelis, Sept. ; 



1 Zygonectes notatus, Sept.; 1 Dorosoma cepedianum, 

 July; 1, 2 \ in., July; 1 Placopharynx] carinatus, Oct.; 1 

 Moxostoma macrolepidotum, Sept.; 1 Erimyzon sucetta, 

 If in.; 2 Carpiodes, Oct.; 11 Ictiobus bubalus, Oct.; 2 I. 

 urus, Oct. : 1 Amiurus natalis, Oct. ; 2, 2-2 J in., July. 



Naias flexilis : 3 Lepomis pallidus, May, July, Nov. 



Potamogeton : 1 Ambloplites rupestris, yg.; 1 Notropis meg- 

 alops, Apr. ; 1 Ictiobus bubalus, Oct. ; 3 Ictalurus punctatus, 

 June, Sept.; 1 Amiurus nebulosus, May; 1 A. marmoratus, 

 Oct.; 9 Polyodon spathula, May. 



P. gramineus : 2 Ictalurus punctatus, Oct. 



AQUATIC CRYPTOGAM! A. 



Chara: 1 Lepomis gibbosus, July; 1 Moxostoma macrolepi- 

 dotum, June; 1 Amiurus nebulosus, July. 



Algce, filamentous : 3 Pe^cina caprodes, Aug.; 2 Lepomis 

 gibbosus, June, Aug.; 1 yg.;9 L. pallidus, July, Aug., Oct., 

 Nov.; 1 Pomoxys, July; 1 Aphredoderus sayanus, Sept.; 

 4 Eucalia inconstans, Oct.^ 1 Garnbusia patruelis, Sept.: 

 9 Zygonectes notatus, Sept., Oct.; 1 Fundulus diaphanus, 

 Oct.; 2 Dorosoma cepedianum, June, July; 3 Notemigonus 

 chrysoleucus, Aug., Sept.; 4 Semotilus atromaculatus, 

 July; 3 Hybopsis biguttatus, Aug.; 4 Notropis, yg.; 1 N. 

 atherinoides, Aug.; 8 N. megalops, Apr., May, June; 7 N. 

 whipplei, Apr., May, June, Aug.; 7 N. hudsonius, May, 

 June, July; 2 N. heteu&ibn, Apr., May; 3 Pimephales 

 notatus, July, Oct.; 1 Hybognathus nuchalis, May; 2 

 Chrosomus erythrogaster, Sept.; 7 Campostomaanomalum, 

 Aug., Sept.; 2 Moxostoma, yg.; 1 M. macrolepidotum, 

 Sept.; 1 Erimyzon sucetta, July; 2 Catostomus teres, June, 

 Aug.; 3 Ictiobus bubalus, Aug. Oct.; 3 I. urus, Aug.; 4 

 I. cyprinella, June, Aug.; 3 Ictalurus punctatus, Oct.; 1 

 Araiurus nebulosus, May; 1,2 in., Aug.; 1 Noturus, yg.; 



2 N. gyrinus, May; 3 Polyodon spathula, May, June, Aug. 

 Algce, unicellular : 1 Dorosoma cepedianum, July; 2 Notropis, 



yg.; 2 N. whipplei; 1 N. hudsonius, July; 1 Pimephales 



