Food Relations of Fresh-Water Fishes. 513 



Limncea: 1 Notropis whipplei, Apr.; 1 Moxostoma macrolepi- 

 dotum, May. 



Physa: 1 Lepomis gibbosus, yg.; 2 L. pallidus, Nov.; 1 Umbra 

 limi, Sept.; 3 Gambusia patruelis, Sept., Oct.; 1 Zygo- 

 nectes dispar, July; 3 Z. notatus, Sept., Oct.; 1 Moxostoma 

 macrolepidotum, May; 2 Amiurus natalis, 2J in., July; 3 

 A. nebulosus, Aug., Sept.; 1 A. marmoratus, Aug. 



P. heterostropha : 2 Perca lutea, May; 1 Amiurus nebulosus, Oct. 



Planorbis: 1 Aplodinotus grunniens, June; 1 Lepomis gib- 

 bosus, July; 1 L. notatus, Sept.; 1 L. pallidus, Nov.; 1 

 Umbra limi, July; 1 Gambusia patruelis, Sept.; 1 Zygo- 

 nectes dispar, July; 2 Fundulus diaphanus, June, Oct.; 2 

 Moxostoma macrolepidotum, May, Sept.; 2 Ictiobus buba- 

 lus, Oct.; 1 Ictalurus punctatus, Oct.; 1 Amia calva, Aug. 



P. deflectus, yg.: 1 Notemigonus chrysoleucus, May. 



Ancylus: 1 Percina caprodes, Aug. 



LAMELLIBRANCHIATA. 



Sphcerium: 2 Aplodinotus grunniens, June, Oct.; 1 Perca 

 lutea, Oct.; 1 Lepomis pallidus, Oct.; 1 Dorosoma cepedi- 

 anum; 1 Placopharynx carinatus, Oct.; 4 Moxostoma, 

 June; 1 M. aureolum, June; 3 M. macrolepidotum, June, 

 Sept.; Minytrema melanops, Sept., Oct.; 2 Hypentelium 

 nigricans, Aug.; 1 Catostomus teres, Oct.; 3 Ictiobus 

 velifer, Aug., Oct.; 7 I. bubalus, Aug., Oct.; 4 I. urus, 

 Aug., Nov.; 2 I. cyprinella, June, Oct.; 13 Amiurus nebu- 

 losus, May, Sept., Oct.; 1 A. marmoratus, Oct.; 2 Amia 

 calva, Sept. 



S. sulcatum: 1 Ictiobus bubalus, Oct.; 4 Amiurus nebulo- 

 sus, Sept.; 1 A. marmoratus, Aug. 



Pisidium: 1 Fundulus diaphanus, June; 1 Amiurus nebulosus, 

 Sept. 



Unionidce: 1 Lepomis notatus, Sept.; 1 Labidesthes sicculus, 

 Oct.; 1 Ictiobus urus, Apr.; 2 Ictalurus punctatus, Sept.; 

 2 Amiurus nebulosus, May, Oct.; 1 A. marmoratus, Oct. 



Unio: 1 Aplodinotus grunniens, June; 1 Perca lutea, May; 2 

 Lepomis gibbosus, yg.; 1 Moxostoma macrolepidotum, 

 May; 1 Catostomus teres, June. 



Anodonta: 2 Aplodinotus grunniens, June; 1 Lepomis mega- 

 lotis, June; 2 Ictalurus punctatus, Aug., Oct. 



