46 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
and, finally, the “ Blue Pike” is possibly, but improbably, distinct from 
the ** White Salmon”. 
Without further discussion, I will give the synonymy and characters 
of the species now recognized. 
30. STIZOSTETHIUM VITREUM (Mitchill) Jordan & Copeland. 
Wall-eyed Pike—Glass Eye—“Dory’’— ‘‘Salmon ''—Pike-perch—Doré—_Okow— 
Horn Fish—Green Pike—Yellow Pike (?female). 
Perca vitrea, MITCHILL (1818), Supplement Am. Monthly Mag. ii, 247 (Cayuga Lake). 
Stizosledium vidreum, JORDAN & COPELAND (1876), Check List N. Am. Fresh Water 
Fishes, Bull. Buff. Soc. Nat. Hist. 136. 
Stizostethium vitreum, JORDAN (1877), Ann. N. Y. Lyc. Nat. Hist.—JORDAN (1877), in 
Klippart’s Rept. Fish Commr. Ohio. 
Lucioperca americana, Cuv. & VAL. (1829), ii, 122.—RicHARDSON (1836), Fauna Bor.- 
Am. iii, 10—KrIrRTLAND (1838), Zool. Obio, 192; Bost. Journ. Nat. Hist. iv 
237.—THOMPSON (1842), History Vt. 130.—Dr Kay (1842), Zool. N. Y. Fishes, 
17.—SToRER (1846), Synopsis, 276.—AGassiz (1850), Lake Superior, 294.— 
JARDINE (1852), Nat. Libr. Perches, 107.—GUNTHER (1859), Cat. Fishes, i, 74— 
JORDAN (1874), Ind. Geol. Survey, 212; and of writers generally. 
Stizostedium americanum, Copké (1865), Proc. Acad. Nat. Sci. Phila. 82, 85.—CopPE 
(1870), Proc. Am. Philos. Soc. 448.—MILNER (1872-3), Rept. U.S. Fish Comm. 
425.—JORDAN (1876), Man. Vert. 225.—UnLER & LuGGER (1876), Fishes of 
Maryland, 110.—NELSson (1876), Bull. Ills. Mus. Nat. Hist. 36. 
Body elongate, rather slender and subcylindric, becoming deep with 
age; the depth in young of 14 inches, 44 to 5 in length; head long, 33 
in length. Mouth large, the maxillary reaching beyond the pupil to 
posterior margin of orbit; its length 23 to 3 in head. Mandible a little 
more than half length of head; eyes large, less than in salmoneum, 
shorter than snout and than preopercle, 44 to5in head. Jaws equal, or 
the lower slightly projecting, its sides somewhat included. Cheeks 
scaly, varying to nearly smooth, usually a few scales at least behind 
the eye. Opercle with a strong flat spine, which is sometimes bifid or 
trifid ; no smaller ones below it. Dorsal spines high, more than half 
the length of head, as long as from snout past eye and % to } past 
opercle. 
General color a heavy olive, varying considerably, finely mottled with 
brassy, the latter color forming indistinct lines, which run obliquely 
upward and backward along the rows of scales. Sides of head more 
or less vermiculated; lower jaw flesh-colored; belly and lower fins 
pinkish. 
Spinous dorsal fin without black spots except a large jet-black blotch, 
which involves the membrane of the last two or three spines. Second 
°. 
