530 CONTRIBUTIOXS TO NORTH AMERICAN ICHTHYOLOGY IV. 
second anal spine ^ length of head. Axis of body rather below the 
middle of its depth. Head conical, slightly depressed at the nape. 
Month small, nearly horizontal; maxillary reaching middle of pupil. 
Ilead about 3^ in length; depth about 2J. Eye large, its diameter 
equal to the length of the snout. D. IX-I, 14; A. Ill, 12 ; Lat. 1. 55. 
L. 15 inches. Great Lakes, Mississippi Valley, and northward. A game 
fish of some repute. 
(Ferca chrijsops Raf. Ich. Oh. 1820, 28: Lahrax muUiUneatus Kirtland, Bost. Jour. 
Nat. Hist. V, 21: Eoccus chrysops Gill, Proc. Acad. Nat. Sci. Phila. 1860, 118: Labrax 
osculaiii, muHiJineata, aud notata Giinther, i, 65, 67 : Labrax albidtis Dekay, New York 
Fauna, Fish. 1842, 13.) 
bb. No teeth on base of tongue; second anal spine enlarged; jaws equal; scales on 
cheeks ctenoid; dorsal fins somewhat connected, (ilorone* Gill.) 
d. Sides strijied with black. 
§32. R. isaSerruptiis (Gill) J. & G. — YeUow Bass. 
Brassy, tinged with olivaceous above ; sides with 7 very distinct lon- 
gitudinal black bands, darker than in the other species, those below 
the lateral line interrupted jiosteriorly, the posterior iiart alternating 
with the anterior. Body oblong-ovate, with the dorsal outline much 
arched. Head depressed, somewhat j)ointed, its profile concave. Eyes 
large, their diameter equalling length of snout. Mouth somewhat 
oblique, maxillary nearly reaching middle of orbit. Si^ines very robust; 
second anal spine f length of head. Dorsal fins little connected. Head 
3 in length; depth 2§. D. IX-I, 12; A. Ill, 9 ; Lat. 1. 50. L. 1 foot. 
Mississippi Valley, chieflj" southward; north to Illinois. 
{Labrax chrysops Girard, U. S. Pac. R. R. Surv. Fish. 1858, 29; not Perea chrysops 
Raf.: Moi'one interrnpta G\\\, Proc. Ac.ad. Nat. Sci. Phila. 186p, 118.) 
dd. Sides not striped with black. 
§33. R. amcricaiiiis (Gmel.) J. & G. — White Perch. 
Olivaceous ; sides silvery, with faint lighter streaks. Body oblong- 
ovate; dorsal outline much arched; the head depressed above eyes, 
and rather pointed. Mouth rather small, somewhat oblique, maxillary 
nearly reaching the vertical from the middle of the orbit. Eye mod- 
erate, its diameter about equal to length of snout. Spines strong, the 
second anal spine nearly ^ length of head. Dorsal fins considerably 
connected. Head 3 in length; depth about 3. D. IX-1, 12; A. HI, 9; 
* Gill, Proc. Acad. Nat. Sci. Phila. 1860, 116: type Perea umencaHa Gmel. Morone 
Mitch. Rept. Fish. N. Y. 1814, 18; is projserly a synonym of Pej’ca. (Meaning, if any, 
unknown. ) 
