ii6 



VERTEBRATE ANIMALS OF THE UNITED STATES 



bands; fins dusky; a black spot on the opercle; rays of dorsal fin XI 

 or XII, lo or ii; anal V, lo; scales 6-43-12: New York to South Caro- 

 lina, in sluggish coastwise streams; common. 



4. Ambloplites Rafinesque. 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. rupestris (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 





Fig. 51. — Chcrnobryttus gulosiis {from Fishes of Illinois). 



of dorsal fin XI, 10; anal VI, 10; scales 6 or 7-39 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; Hngual 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; depth 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 A mhloplites; opercle convex at the 

 angle; hinder margin of tail emarginate; tongue with teeth: i species. 



