_Ambloplites rupestris._ Rock-bass. Body oblong, moderately compressed; head 2-3/4; depth 2-1/2; eye 4; D. XI, 10; A. VI, 10; scales 5-40-12, with 6 to 8 rows on cheeks; mouth large, maxillary extending to posterior part of pupil; teeth small, single patch on tongue; gill-rakers 7 to 10, on lower part of arch; preopercle serrate near its angle; opercle ends in 2 flat points. GENUS ARCHOPLITES _Archoplites interruptus._ Sacramento Perch. Body oblong-ovate, compressed; head 2-2/3; depth 2-1/2; eye 4; D. XII, 10; A. VI, 10; scales 7-45-14; 8 rows on cheeks; mouth very large, maxillary extending beyond pupil; teeth numerous and small, with 2 patches on tongue; gill-rakers 20; opercle emarginate; most of the membrane bones of head serrate. GENUS CHÆNOBRYTTUS _Chænobryttus gulosus._ Warmouth Perch. Body heavy and deep; head 2-1/2; depth 2-1/4; eye 4; D. X, 9; A. III, 8; scales 6-42-11; 6 to 8 rows on cheeks; teeth small and numerous; gill-rakers 9; preopercle entire; mouth very large; opercle ends in a black convex flap. GENUS LEPOMIS _Lepomis pallidus._ Blue Sunfish. Body short and deep, compressed; head 3; depth 2; eye 3-1/2; D. X, 12; A. III, 12; scales 7-46-16; 5 rows on cheeks; mouth small, maxillary barely reaching eye; teeth small and sharp; opercular flap without pale edge; gill-rakers x + 11 to 13. _Lepomis megalotis._ Long-eared Sunfish. Body short and deep, the back arched; head 3; depth 2; eye 4; D. X, 11; A. III, 9; scales 5-40-14; 5 rows on cheeks; mouth small and oblique; opercular flap long and broad, with red or blue margin; gill-rakers x + 8 or 9. _Lepomis auritus._ Red-breast Sunfish. Body elongate; head 3; depth 3; eye 4; D. X, 11; A. III, 9; scales 6-45-15; mouth large, oblique; palatine teeth present; gill-rakers _x_ + 8 or 9, quite short; opercular flap very long and narrow; scales on breast very small; 7 rows scales on cheeks. GENUS EUPOMOTIS _Eupomotis gibbosus._ Common Sunfish. Body short and deep, compressed; head 3; depth 2; eye 4; D. X, 11; A. III, 10; scales 6-45-13; 4 rows on cheeks; mouth small, oblique, maxillary scarcely reaching front of eye; pharyngeal teeth paved and rounded; gill-rakers soft and small, _x_ + 10; opercular flap rather small, the lower part bright scarlet. GENUS POMOXIS _Pomoxis sparoides._ Calico-bass. Body oblong, elevated, much compressed; head 3; depth 2; D. VII, 15; A. VI, 17; scales 40 to 45; 6 rows on cheeks; mouth large, maxillary reaching to posterior edge of pupil; snout projecting; fins very high, anal higher than dorsal. _Pomoxis annularis._ Crappie. Body rather elongate; head 3; depth 2-1/3; D. VI, 15; A. VI, 18; scales 36 to 48; 4 or 5 rows on cheek; mouth very wide; fins very high, but lower than _sparoides_.