529 



From the following complete list, compared with that made at 

 Ottawa, it seems that the fishes taken here represented the normal 

 river stock at this place, with practically no immediate admixture 

 from small tributary streams. 



I Gizzard-shad (Dorosoma cepedianum). 



3 Carp, adults, and several hundred young. 



I Short-headed red-horse (Mo.vostoina breznceps). 



I Blunt-nosed minnow (Pimephales notatiis). 



5 Golden shiner {Abramis chrysoleucas) . 



3 Silverfin (Notropis whipplU). 



I Notropis jejiimis. 



Very many shiners {Notropis atherinoides) . 



I Black bullhead (Ameiunts nielas). 



I Large-mouthed black bass (Micro pteriis saluioides). 



La SaIvIvE-Peru 



In August, 191 1, the water at Peru had still a grayish look, was 

 full of very minute grayish particles, and had a slight sewage odor, 

 more pronounced near the northern side, partly, no doubt, because 

 of sewage entering the stream at La Salle and Peru. The presence 

 of Vermilion River water on the south side probably increased this 

 difference. The water temperature August 2, was 72° F. The only 

 collections made, besides those of fishes reported above, were mussels 

 obtained in 19 12 by the use of the mussel-bar. Thirty-six specimens, 

 representing ten species, included twelve living specimens of five of 

 the species only, namely, Lampsilis data, L. ligamentina, L. gracilis, 

 Quadrula plicata, and Symphynota couiplanata. The large propor- 

 tion of dead specimens, as compared with the ratios obtained farther 

 down the stream, indicate unfavorable conditions for mussels in the 

 stretch of river between L^tica and Peru. The following is a com- 

 plete species list. 



