LAMPREYS AND FISHES OF INDIANA. 287 



Family SERRANID.E. 



Body more or less compressed, and covered with ctenoid scales. Lat- 

 eral line fully developed, but not running back on the caudal rays. 

 Dorsal with stift spines. Anal spines three. Ventral with one spine 

 and five rays. Pseudobranchire large. Premaxillary protractile. 

 Teeth on vomer and palatines, and often on the tongue. Canine teeth 

 sometimes present on the jaws. Preopercle with its posterior margin 

 usually serrate. 



Teeth on the base of the tongue ; anal rays III, 12 ; lower jaw pro- 

 jecting. Roccus, p. 287. 



No teeth on base of tongue, but patches at the tip; anal rays III, 9 ; 

 jaws equal. Morone, p. 288. 



Genus ROCCUS Mitchill. 



Body elongate, little or much compressed. Mouth rather large, nearly 

 horizontal. Teeth oh the base of the tongue in one or two patches. 

 Lower jaw projecting beyond the upper. Dorsal fins separated. Anal 

 rays III, 12. 



RoCCUS CHRYSOPS (Raf.). 



White Bass. 



Jordan and Gilbert, 1882, 8, 529; 1884, 12, 428, pi. 171. 



Body deep and compressed, the outline descending to the snout; 

 slightly concave over the eyes. Depth in the length about two and one- 

 half. Head pointed, in the length three and one-third times. Mouth 

 moderate, the maxillary reaching back to a perpendicular from the pu- 

 pil. Preoi^ercle sharply serrated. Lateral line complete, nearly straight. 

 Scales 10-55-13; those of the body closely overlapping. Small scales 

 extending far out on the caudal and anal rays. Cheeks with about ten 

 rows of scales. Opercles scaly. Dorsals separate, IX-I, 14 ; anal 

 rays III, 12. Bluish or greenish above. Sides silvery, with dark longi- 

 tudinal bands, four or five above the lateral line. Those below the 

 lateral line often not continuous. Length ten to twelve inches. 



Upper Mississippi Valley south to Ohio River, and in the region of the 

 Great Lakes ; common northward ; abundant in Lake Michigan. It is 

 rarely taken in the Ohio River. It was found in the Wabash River by 

 Le Sueur (17, III, 448, Perca midtilineata) . Some years ago I took a 

 specimen five inches long in the Wabash River at New Harmony. 



This species is frequently seen in the markets of Chicago. Its flesh is 

 sweet and well flavored. The fish prefers the quiet waters of the lakes 

 and of the larger streams. Bean (25, 133) states that it spawns in deep 

 water during May and June. Forbes found the food to consist to a great 



