( 44 ) 



64. tS. namaycush, Penn. Lake Trout. Abundant in Lake Michigan. 



Genus Argtjroaomusi, Ag. 



65. A. (iupeiformh, (Mitch.) Ag. Lake Herring. Very abundant in 

 Lake Michigan. The sisco (A, siaco, Jord.) undoubtedly occurs in the deep 

 sandy lakes in the northeastern part of the state. 



66. A. nigripinnis, Gill. Black-fin. Common in deep water in Lake 

 Michigan. 



67. A. hoi/i, Gill. Lake Michigan Sisco. Found in deep water in 

 Lake Michigan. 



Genua Core.gonus, Linn. 

 68 C. albus, LeS. White-fish. Very abundant in Lake Michigan. 



FAMILY HYODONTIDAE. 

 Genus Hyodon, LeS. 



69. H. tergisui', LeS. Moon-eye. Common in Lake Michigan and in 

 all the large streams throughout the state. 



FAMILY CLUPEIDAE. 



Genus Alosa, Cuv. 



70. A. sapidissima, ( Wils.) Star. Common Shad. Has been intro- 

 duced into one or two streams in the northern part of the state ; but whether 

 it thrives or not, has not been proven. 



Genus Pomolobus, Raf. 



71. P. chrysochrous, Raf. Ohio Shad Found in the Ohio and Mississippi 

 rivers, and sometimes ascends the Hlinois. It is also accredited to Lake 

 Michigan by Mr. J. JN. Milner. 



Gevus Dorosoma , Raf. 



72. B. notafum, Raf. Grizzard Shad. Very common in the rivers in 

 the southern and central parts of the state, and, since the opening of the 

 canal connecting the Chicago river with the Illinois, has found its way, with 

 the preceding, into Lake Michigan. 



For some time previous to this date, (December 2nd , the young, from 

 three to four inches long, have been frequenting, in considerable numbers, a 

 "slip" extending from the Chicago i-iver to one of the City Water Works 

 buildings. The attraction to the fishes appears to be the hot water which 

 runs into the "slip" from the Water Works engines. As the fishes swim 

 about in this warm water, they strike the hot stream as it flows in, and many 

 are killed. The opening of the above mentioned canal will have considera- 

 ble influence upon the distribution of the lake and river fishes, and numer- 

 ous species will in all probability take advantage of the communication be- 

 tween the Mississippi and the great lakes. 



This undoubtedly accounts for the occurrence of Chaenohryttus gulosus 

 in Lake Michigan, as well as of the two preceding species. 



FAMILY CYPRINIDAE. 



Genus Campostoma, Ag. 



73. C. anomalnm, (Raf.) Ag. Stone Roller. Occurs in the greatest 

 abundance throughout the state, although perhaps more rarely in the vicinity 



