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. 



Chidophora : 4 Ictalurus puiictatus, Oct. 



C. fjlomerata: 1 Notropis megalops, June. 



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



Scenedesmiis: 2 Ictiobus cyprinella, Aug. 



Protococcus: 1 Dorosoma cepedianum, 2| in., July; 1 Erimyzon 

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

 Aug. 



Glwocystis : 1 Notropis whipplei, Apr. 



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

 1 N. whipplei, Apr. 



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

 anum, Apr., July; 1, 2^ in., Jaly; 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.; I Ictiobus bubalus, Aug; 4 

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

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



Pinnidaria : 1 Gambusia patruelis, Sept. 



Pleurosigma : 1 Moxostoma macrolepidotum,.2| in., Aug. 



Cymafopleura : 3 Notropis, yg. 



Desmideo': 1 Notropis megalops. May; 1 Pimephales notatus, 

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



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

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

 July, Aug.; 1 Erimyzon sucetta, 1? 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. 



Cosmaritmi : 4 Notropis, yg.; 1 M. macrolepidotum, 2^- in., 

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



Staiirastrwn: 1 Erimyzon sucetta, yg.; 1 Ictiobus cyprinella, 

 Aug. 



