CENTEARCHTD^. — XCu.. 237 



Ag. O. obscurus, DeK. (young.) M. acMgan, (Raf.) Gill, 

 etc., etc.] 



2. AMBLOPLITES, Rafinesque. Rock Bass. 



< Centrarchus, Cuvier. 



1. A. rupesiris, (Raf.) Gill. Rock Bass. Goggle 

 Eye. Red Eye. Depth about half length; head more 

 than one -third; eye nearly four in head, very large; 

 cheeks scaly; front convex; longest dorsal ray two-thirds 

 depth of head at front of orbit; brassy olive with golden 

 green and blackish markings; a dark spot at base of 

 each scale, which is conspicuous after death, giving a 

 striped appearance; D. XI, 11; A. VI, 10; lat. 1. 43; L. 

 8. Great Lakes and rivers west of the AUeganies; an 

 abundant species. [A. ceneus, (C. & V.) Ag. A. ichthe- 

 loides, (Raf.) Ag.J 



2. A. cavifrons. Cope. Depth 3^ in length; mouth 

 larger, muzzle more projecting, the front therefore con- 

 cave, cheeks nearly naked; eyes still larger, 3 in head; 

 longest dorsal ray equal to depth of head at front of 

 orbit; silvery, dusted with dark points; scales with dark 

 shades; D. X, 12; A. VI, 11; lat. 1. 38. Roanoke R. 



3. ACANTHARCHUS, Gill. Bass Sun Fishes. 



< Centrarchus, Baird. 

 1. A. pomotis, (Baird) Gill. Mtjd Sun Fish. Ellip- 

 tical; mouth large; dark greenish olive, with dull yellow- 

 ish markings and longitudinal dusky streaks; opercles 

 with dusky radiating bars; D. XI, 12; A. V, 12; L. 5. 

 Muddy streams coastwise, N. Y. to S. C. 



4. CH^NOBRYTTUS, Gill. Wae Mouths. 

 Calliurus, Ag. 

 1. C. gulosus, (0. & V.) Gill. Black Sun Fish. 

 Dark olive green above; sides greenish and brassy with 



