Food Relations of Fresh-Water Fishes. 537 



promelas, Aug.; 1 Moxostoma, yg.; 1 Ictiobus, yg.; 1 I. 

 bubalus, yg.; 1 I. urus, Aug.; 1 I. cyprinella, Aug. 



Cladophora : 4 Ictalurus puuctatus, Oct. 



C. glomerata: 1 Notropis megalops, June. 



Vaucheria : 1 Ictiobus urus, Aug. ; 1 Ictalurus punctatus, Aug. 



Scenedesmus: 2 Ictiobus cyprinella, Aug. 



Protococcus: 1 Dorosoma cepedianum, 2Jin., July; 1 Erimyzon 

 sucetta, If in.; 1 Ictiobus bubalus, yg.; 1 I. cyprinella, 

 Aug. 



Glceocystis : 1 Notropis whipplei, Apr. 



Spirogyra: 1 Semotilus atromaculatus, July; 2 Notropis, yg.; 

 1 N. whipplei, Apr. 



Diatomacece: 1 Gambusia patruelis, Sept.; 3 Dorosoma cepedi- 

 anum, Apr., July; 1, 2J in., July; 2 Notemigonus chryso- 

 leucus, Aug.; 3 Notropis, yg.; 2 N. megalops, May; 2 N. 

 whipplei, May; 2 N. hudsonius, June, July; 5 N. hete- 

 rodon, May, July, Sept.; 1 Pimephales notatus, July; 2 

 Hybognathus nuchalis, May, Sept.; 1 Chrosomus erythro- 

 gaster, Sept.; 1 Campostoma anomalum, Sept.; 1 Moxos- 

 toma, yg.; 1 Erimyzon sucetta, July; 1 yg.; 5 Hypentelium 

 nigricans, yg.; 1 Catostomus teres, June; 3 Carpiodes, 

 Mar., Sept., Oct.; 2 yg.; 1 Ictiobus bubalus, Aug; 4 

 I. urus, June, Aug.; 3 I. cyprinella, Apr., Aug.; 1 Amiurus 

 nebulosus, 2 in., Aug; 1 Polyodon spathula, June. 



Pinnuldria : 1 Gambusia patruelis, Sept. 



Pleurosigma: 1 Moxostoma macrolepidotum, 2-f in., Aug. 



Cymatoplpura : 3 Notropis, yg. 



Desmidece: 1 Notropis megalops, May; 1 Pimephales notatus, 

 Aug. ; 2 Moxostoma, yg. ; 1 M. macrolepidotum, 2f in., Aug. 



Closterium: 3 Notemigonus chrysoleucus, Sept.; 4 Notropis, 

 yg.; 2 Moxostoma, yg.; 5 M. macrolepidotum, 2-2^ in., 

 July, Aug.; 1 Erimyzon sucetta, 1J in.; 2 yg.; 2 Hypen- 

 telium nigricans, yg.; 2 Catostomus teres, June, Aug.; 1 

 Ictiobus, yg.; 1 Carpiodes, yg.; 1 Ictiobus bubalus, yg.; 1 I. 

 cyprinella, Aug. 



Cosma-rium: 4 Notropis, yg.; 1 M. macrolepidotum, 2| in., 

 Aug.; 1 Erimyzon sucetta, 1J in.; 2 yg. 



Staurastrum: 1 Erimyzon sucetta, yg.; 1 Ictiubus cyprinella, 

 Aug. 



