THE YELLOW BASS, WHITE BASS, ROCK BASS, 

 CALICO BASS, CRAPPIE, YELLOW PERCH 

 AND OTHER "BOYS' FISHES." 



BY DAVID STARR JORDAN. 



THE sauger Stizostedium canadense (C. H. Smith). 



Description. Body elongate, more terete than in the Wall- 

 eye, with the bach' broad and scarcely compressed; depth of 

 the body four and one-half to five times in length; head quite 

 pointed, about three and one-half in length, slope of the pro- 

 file greater than in the Walleye; eye smaller, five to five and 

 one-half times in the head; mouth rather smaller, the lower 

 jaw included; maxillary reaching to opposite posterior margin 

 of eye; opercle with a sharp, flat spine, usually a smaller one 

 ^elow it, and an obscure one above; sometimes two or three 

 smaller ones below, often" none; the position and number of 

 these spines extremely variable; specimens preopercle strongly 

 serrate, the lower spines hooked forward; cheeks usually 

 scaled the hinder third, or less, sometimes naked; median 

 furrow on top of head closely scaled. Coloration paler and 

 more translucent, the shades less blended than in the Wall- 

 eye; olive gray above, sides considerably brassy or pale orange, 

 with much black mottling; the black gathered into several 

 definite dark areas, the most distinct of these being opposite 

 the second dorsal; two others fainter, at each extremity of 

 the spinous dorsal, and one at base of caudal ; these blotches 

 are irregular and diffuse, but very characteristic; young spec- 

 imens are pale orange, with broad black shades; spinous 

 dorsal, with two or three rows of round black spots, one of 

 each row on the membrane between each pair of spines; indis- 

 tinct blotch on posterior part of the fin; a large black blotch 

 at base of pectorals; second dorsal with about three rows of 

 irregular dark spots; caudal yellowish and dusky, almost 



407 



