FISHES 109 



York to Texas, in coastwise streams; the basins of the Great Lakes and 

 the Mississippi; common in sluggish streams and ponds. 



3. Acantharchus Gill. Body rather elongate, not much com- 

 pressed or elevated; mouth rather large, oblique; scales large, cycloid; 

 tail fin rounded; supplementary maxillary present: i species. 



A. pomotis (Baird). Mud sunfish. Length 150 mm.; head 2.6; 

 depth 2; color very dark greenish with several indistinct wide dark 

 lateral bands; fins dusky; a black spot on the opercle; rays of dorsal lin 

 XI or XII, 10 or 11; anal V, 10; scales 6-43-12: New York to South 

 Carolina, in sluggish coastwise streams; common. 



4. Ambloplites Rahnesque. Body elliptical, compressed, moder- 

 ately elevated; mouth large, the lower jaw projecting; supplementary 

 maxillary large; opercle ending in 2 flat points; scales large, somewhat 

 ctenoid, lingual teeth in one patch; gill-rakers less than 10; lateral line 

 complete; dorsal fin much longer than anal; caudal margin concave: i 

 species. 



A. nipestris (Raf.). Rock bass (Fig. 9). Length 300 mm.; head 

 2.75; depth 2 to 2.5; color olive green, with dark mottlings and a dark 

 spot on each scale ; a black opercular spot ; eye red and very large ; rays 

 of dorsal fin XI, 10; anal VI, 10; scales 5-39 to 43-12: Vermont to 

 Manitoba; southward to Alabama, Louisiana and Texas; very common 

 west of the Alleghenies. 



5. Archoplites Gill. Body elliptical, compressed, elevated; mouth 

 large, oblique, the lower jaw projecting; opercle emarginate; gill-rakers 

 about 20; lingual teeth in 2 patches; scales strongly ctenoid; hinder 

 margin of tail emarginate: i species. 



A. interruptiis (Girard). Sacramento perch. Length 500 mm.; 

 head 2.6; epth 2.5; color blackish above, sometimes all over; sides 

 silvery, with about 7 vertical blackish bars; a black opercular spot; 

 rays of dorsal fin XII or XIII, 10; anal VI or VII, 10; scales 7-40 to 

 51-14: basin of the Sacramento and San Joaquin Rivers; the only 

 percoid fish west of the Rockies. 



6. Chaenobryttus Gill. Similar to Ambloplites; opercle convex at 

 the angle; hinder margin of tail emarginate; tongue with teeth: 

 I species. 



C. gulosus (Cuvier & Valenciennes). Warmouth (Fig. 51). Length 

 250 mm.; head 2.5; depth 2.25; color olive green, clouded with red or 

 blue, yellow below; sides sometimes with scattered dark spots; rays of 

 dorsal fin X, 9 or 10; anal III, 8 or 9; scales 6 or 7-40 to 46-11 or 12; 

 dorsal spines low: Great Lakes to Florida, Georgia and Texas; westward 

 to Iowa and Kansas; common in the south. 



