46 CONTEIBUTIONS 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. 



TWall-eyed Pike— Glass Eye— "Dory "— " Salmon " — Pike-perch— Dore—Okow — 

 Horn Pish — Green Pike— Yellow Pike (? female), 



Perea vitrea, MitChill (1818), Supplement Am. Monthly Mag. ii, 247 (Cayuga Lake). 



Stizostedium vitreum, Jordan & Copeland (1876), Check List N. Am. Fresh Water 

 Fishes, Bull. Buff. Soc. Nat. Hist. 136. 



StizostetJiium vitreum, Jordan (1877), Ann. N. Y. Lye. Nat. Hist. — Jordan (1877), in 

 Klippart's Kept. Fish Commr. Ohio. 

 Zucioperca americana, Cuv. & Val. (1829), ii, 122. — Richardson (1836), Fauna Bor.- 

 Am. iii, 10.— Kiktland (1838), 2;ool. Ohio, 192; Bost. Journ. Nat. Hist, iv 

 237.— Thompson (1842), History Vt. 130.— De 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, Cope (1865), Proc. Acad. Nat. Sci. Pbila. 82, 85. — Cope 

 (1870), Proc. Am. Philos. Soc. 448.— Milner (1872-3), Kept. U. S. Fish Comm. 

 425.— Jordan (1876), Man. Vert. 225.— Uhler & Lugger (1876), Fishes of 

 Maryland, 110.— Nelson (1876), Bull. Ills. Mus. Nat. Hist. 36. 



Body elongate, rather slender and subcylindric, becoming deep with 

 age 5 the depth in young of 14 inches, 4| to 5 in length ; head long, 3§ 

 in length. Mouth large, the maxillary reaching beyond the pupil to 

 posterior margin of orbit ; its length 2| 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, 4J to 5 in 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 5 no smaller ones below it. Dorsal spines high, more than half 

 the length of head, as long as from snout past eye and ^ to i 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 



