DOROSOMIDiE — CLUPEID^. 67 



Family: Dorosomid^;. 



Genus: Dorosoma. 



Dorosoma cepedianum (Le Sueur). Gizzard Shad. 



Head 4}^; depth 2)4; eye 4^. D. 12, its last ray prolonged and filiform, 

 about as long as head; scales 56-23. Body deep, compressed, the back ele- 

 vated in adult; belly compressed to an edge, serrated and covered by scutes, 

 17 in front of vent, 12 behind. Mouth small, inferior, no teeth. An adipose 

 eyelid. No lateral line. Stomach short, muscular, like the gizzard of a 

 fowl. Caudal fin widely forked, lower lobe the longer. Color silvery-bluish 

 above; young with a round, dark spot at shoulder; tips of ventrals and edge 

 of anal often dusky. Length 15 inches. 



This handsome, worthless species is now well distributed over 

 the state in the lake and larger streams, although it is said that 

 previous to the opening of the canals it was not found in the 

 lake drainage. The form resident in the Mississippi valley is 

 known as var. heturum. Given by Kirtland as Chatoessus ellip- 

 ticus. Ohio river, Lake Erie and Licking reservoir, Jordan's 

 Report; Hamilton County, " very common in the Ohio river," 

 Henshall, 1888 ; Lorain County, " quite common in the lake aad 

 ascending the rivers," McCormick, 1892; Maumee river at 

 Defiance and Grand Rapids, St. Mary's river at St. Mary's and 

 Rockford, Tiffin river at Brunersburg, Auglaize river at Clover- 

 dale, Oakwood and Defiance, Hoaglin creek near Oakland and 

 Gordon creek near Cecil, Kirsch, 1893 >* abundant in St. Mary's 

 reservoir and in the waste way of the St. Mary's reservoir into the 

 headwaters of the Wabash river at Celina, R. C. Osburn, 1899 > 

 Chippewa lake, Ohio river at Bellaire and Licking reservoir, very 

 abundant at the last place, R. C. Osburn, 1900. 



Family: CijjpEid^. 



Genus: PomoIvObus. 



Pomolobus chrysochloris Rafinesque. Skipjack ; Blue Herring. 



Head 3^; depth 3^; eye shorter than snout, large, well covered by an 

 adipose eyelid, 4^ in head. D. 16, its posterior ray not prolonged; A. 18; 

 about 52 scales in lateral line. Body elliptical, much compressed; belly 

 compressed to an edge which is covered with scutes, 20 before vent, 1^ 



