51. ESOCID^ ESOX. 353 



I 



1)1). Branchiostegals 14-16. 



575. E. reticiilatns Le Sueur. Common Eastern Pickerel ; Green Pike. 



Body rather slender, deepest near the middle and tapering backward 

 to a slender caudal peduncle ; head long, the snout prolonged, so that 

 it is not much shorter than the rest of the head; eye small, about 3 in 

 snout, 8 in head; caudal well forked. Color green of varying shades, 

 sides with golden lustre, and marked with numerous dark lines and 

 streaks, which are mostly horizontal, and by their junction with one 

 another produce a reticulated appearance; a dark baud below eye; fins 

 plain. Head 3; depth 6. B. 15;' D. 14; A. 13 (counting developed 

 rays only as in other cases) ; Lat. 1. 125. L. 21 inches. Maine to Ala- 

 bama, everywhere east of the mountains, not found west of the Alle- 

 ghanies. 



(Le Suenr, Journ. Acad. Nat. Sci. Phila. i, 440, 1818; Giiuther, vi,229; Storer, Fish. 

 Mass. 311, and of all authors: Esox affinis Holbrook, Ich. S. Car. 1860,198: Esox phalc- 

 ratus Say, Journ. Acad. Nat. Sci. Phila. i, 41(5.) 



aa. Cheeks scaly; lower half of opercles bare; hranchiostegals 14-16; species light- 

 spotted on a darker ground. (Esox.) 



576. E. Indus L. Pike. 



Body moderately elongate, the back little elevated ; head rather long, 

 the eye exactly midway in its length. General color bluish, or greenish 

 gray, with many whitish spots which are usually smaller than the eye 

 and arranged somewhat in rows; dorsal, anal, and caudal fins with 

 roundish black spots ; young with the white spots coalescing, forming 

 oblique cross bars; a white horizontal band bounding the naked part of 

 the operculum. Head 3; depth 5; eye 6 in head. B. 15, in the Amer- 

 ican var. estor (13 or 14 in European specimens); D. 17; A. 14; Lat. 1. 

 123. L. 2-4 feet. Fresh waters of the northern parts of Europe, Asia, 

 and North America ; in the Eastern United States south to Northern 

 Ohio ; very abundant. 



(Esox Indus L. Syst. Nat. ; Giinther, vi, 226, and of authors generally : Esox estor Le 

 Sueur, Jouru. Acad. Nat. Sci. Phila. i, 413, 1H18 : Esox estor Giinther, vi, 228 : Esox depran- 

 dns Giiuther, vi, 229 : Esox loreus Agassiz, L. Superior, 317.) 



aaa. Lower half of cheeks as well as of opercles bare ; branchiostegals 17-19; black- 

 spotted on a lighter ground. (Mascalonyus* Jordan.) 



577. E. nofoilior Thompson. Musical-lunge. 



General form of E. lucius, the head a little larger proportionally ; 

 scaly part of cheeks about as wide as eye ; the scales on both cheeks 



* Jordan, Kept. Ohio Fish. Com. , 1877, 92: type Esox nobilior Thompson. (Latin, 

 masca, mask ; longus, long. ) 



Bull. Nat. Mus. No. 16 23 



