Animals of (lie Mississippi Bottoms near (Jiiincij. 145 



examples seen were taken from the river, where they seemed to 

 be moderately common. The young are easily distinguished 

 from the young of /. cyprinella by their small, inferior mouth, 

 compressed body, and pale colors, — especially of the pectoral 

 and ventral fins. 



Localities : Harkness Slough, Bear Creek, Libby Lake, 

 Dead Man's Slough, Glaus Lake, Broad Lake. 



MoN'GREL Buffalo {Ictiohiis urus, Ag. ). 



In my field notes I have recorded the young of this fish as 

 occurring in the slough at the south edge of Quincy. They 

 were not seen elsewhere. Adults w^ere common in the river, 

 and were sometimes seen of large size. One was noted August 

 6 which weighed twenty and a half pounds. 



Localities : Slough south of (Quincy, Mississippi River. 



Red-mouth Buffalo {Ictiobus cijprinella^ C. & V.), 



Young 4 to 5.75 inches long were extremely common 

 everywhere in sloughs and lakes. They differ from the young 

 of /. hiibalns in having a larger mouth, thicker body, and darker 

 colors. The pectoral and ventral fins are blackish, whereas in 

 the case of the quill-back buffalo they are pale. Most of the 

 large buffalo taken from the river were of this species. 



Localities : Harkness Slough, Bear Creek, Moss Lake, 

 Dead Man's Slough, Claus Lake, Willow Slough, Long Lake, 

 Broad Lake, Wood Slough, slough south of Quincy, Mississippi 

 River. 



Family Silurid^. (Catfishes.). 



Xot lints gijriniis, Mitch. 



Moderately common in sloughs and lakes. 



Localities : Harkness Slough, Dead Man's Slough, Willow 

 Lake, Lily Lake, Long Lake, Broad Lake, Wood Slough. 



Morgan Cat, Yellow Cat {Leptops olivaris, Raf. ). 



This catfish was rare in sloughs and lakes. A single ex- 

 ample 10 inches long from Willow Slough was the only one 

 seen from water of this kind. It was abundant in the river, 

 where specimens of ten pounds weight were frequently taken ; 

 and one was noted August 6 that would pro])ably have weighed 

 18 pounds or more. I am informed that young dog-fish are 

 used on trot lines as bait for this catfish. 



