FERCIDZ. AQ 
dorsal and caudal mottled olive and yellowish. Base of pectorals 
without distinct black spot. 
Fin-rays:—Dorsal XII or XIII[—1, 20 or 21. AnallII,12. Lateral 
line with about 90 scales. Pylorie ceca long and large, subequal, three 
in number. 
Size very large; this species reaches a length of nearly three feet and 
a weight of twenty or thirty pounds. 
Habitat—Upper Mississippi River, Great Lake Region and streams 
of the Atlantic slope, south of New England, north to the Fur Countries. 
31. STIZOSTETHIUM SALMONEUM, fKafinesque. 
Blue Pike (Lake Hrie)—White Salmon (Ohio River). 
Perca salmonea, Ra¥. (1818), Am. Monthly Mag. v, 354; (1820), Ich. Oh. 21. 
Stizostedion salmoneum, RAF. (1820), Ich. Oh. 23. 
Stizostedium salmoneum, COPE (1865), Proc. Acad. Nat. Sci. Phila. 82.—JorpDan (1876), 
Man. Vert.225.—Copn (1870), Proc. Am. Philos. Soc. 449.—JORDAN & COPELAND 
(1876), Check List, 136.—NELSON (1876), Bull. Ills. Mus. Nat. Hist. 36. 
Stizostethium salmoneum, JORDAN (1577), Ann. N. Y. Lyc. Nat. Hist. —; (1877), in 
Klippart’s Rept. Fish Commrs. Ohio, —. 
?? Perca nigropunetata, Rar. (1820), Ich. Oh. 23 (very erroneous). 
?? Pomacampsis nigropunctatus, Rar. (1820), Ich. Oh. 23. 
This species is very similar to the preceding in its technical charac- 
ters, and it may prove to be merely a variety. The body is shorter, 
thicker, and deeper, with slenderer caudal peduncle, the diameter of 
which is not much greater than that of the large eye. The mouth is 
smaller, the maxillary not reaching quite to the posterior margin of the 
pupil, 3 in head; the eye is larger, its diameter equal to the length of 
the snout or that of the preopercle; the lower jaw is slightly included. 
The dorsal spines are evidently considerably lower than in NS. vitreum, 
the longest about equal to the distance from the snout tv a point just 
Short of hinder margin of orbit, about 2} in head. 
The coloration is similar to that of S. vitrewm, but the adult is bluer 
or greener, with scarcely any of the brassiness characteristic of the lat- 
ter species. The coloration of the fins is darker, and there are traces 
of a blackish horizontal band along the dorsal in addition to the large 
black blotch on the hinder rays. Young specimens (from Obio River) 
are more silvery, with traces of faint black bars along the back. 
Fin-rays:—Dorsal XIV—1, 20. Anal IJ, 13. Lateral line with 95 
scales. Opercular spine single, as in S.vitreum. Cheeks largely naked. 
Pyloric cceca three, large, longer than stomach, as in the preceding 
species. 
