528 NEW YORK STATE MUSEUM 



of them developed as antrorse hooks. Spines strong, lO in the 



dorsal fin; dorsal fins more or less connected by membrane; 



second anal spine much enlarged, not shorter than third; anal 



rays III, eight or nine. Vertebrae 12+13=25. Scales rather 



large, ctenoid; top of head scaly; lateral line little arched. 



Yentrals inserted well behind pectorals. Two known species, 



both American. 



261 Morone aanericana (Gmelin) 



White PercJi 



J'trca americana Gmelin, L. Syst. Nat. I, III, 1308, 1788, New York. 

 Morone Rufa Mitchill, Rep. Fish. N. Y. 18, 1814, New York. 

 MoroHC Pallida Mitchill, Rep. Fish. N. Y. 18, 1814, New York. 

 Bodianus nifus Mitchill, Trans. Lit. & Pliil. Soc. N. Y. I, 420, 1815. 

 J^ahrax rufus De Kay, N. Y. Fauna, Fislies, 9, pi. 3, fig. 7, 1842; Guntheb, 



Cat. Fish. Brit. INfus. I, 65. 1859. 

 Lahrax paUidus De Kay, N. Y. Fauna, Fislies, 11, pi. 1, Sg. 2, 1842: 



Glxther, Cat Fish. Brit. Mus. I, 67, 1859. 

 Lahrax nigricans De Kay, N. Y. Fauna, Fishes, 12, pi. 50, fig. 160, 1842. 

 Jioccus americanus Bean, 19th Rep. Comm. Fish. N. Y. 268, pi. XIX, fig. 



23, 1890. 

 Morone americana Gill, Ichth. Rept. Capt. Simpson's Surv. Great Basin 



Utah, 397, 1876; Bean, Fishes Penna. 133, pi. 15, 1893; Jordan & 



Evermanx, Bull. 47, IT. S. Nat. Mus. 1134, 1896, pi. CLXXXI, fig. 

 . 479, 1900; Bean, Bull. Am. Mus. Nat. Hist. IX, 366, 1897; Mearns, 



Bull. Am. Mus. Nat. Hist. X, 321, 1898; Eugene Smith, Proc. Linn. 



Soc. N. Y. 1897, 39, 1898; H. M. Smith, Bull. U. S. F. C. 1897, 99, 1898; 



Bean, 52d Ann. Rept. N. Y. State Mus. 105, 1900. 



The genus Morone of Gill differs from R o c c u s in hav- 

 ing the dorsals joined, the spines strong, the anal with 10 soft 

 rays, its spines not graduated, the jaws subequal and base of 

 the tongue toothless. It includes the common white perch and 

 the yellow bass. 



Tlic white perch has an oblong body, with the back convex, 

 mouth moderate, the maxillary reaching a little beyond the 

 front of the eye; the eye is nearly as long as the snout, and is 

 contained five and one half times in the length of the head; the 

 li'-.id is about one third of total without caudal; the depth of 

 ImmIv i contained two and two thirds times in total without cau- 

 <i''l: the fourth anal spine is the longest, two fifths length of 

 h;ul; 11k> second is stouter and slightly shorter than the third, 

 its l<ng(li on(^ tliird that of head. 



