51. ESOCID^ — ESOX. 
353 
li. Brancliiostegals 14-16. 
575. K. retiCHlatus 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 3i in 
snout, 8 in head; caudal well forked. Color green of varying shades, 
sides with golden lustre, and marked with nnmerons 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.J; depth 6. B. 15; D. 14; A. 13 (counting developed 
rays only as in other cases) ; Lat. 1. 125. L. 24 inches. Maine to Ala- 
bama, everywhere east of the mountains, not found west of the Alle- 
ghauies. 
(Le Sueur, Journ. Acad. Nat. Sci. Pliila. i, 440, 1818 ; Gviuthcr, vi, 229 ; Storer, Fish. 
Mass. 311, aud of all authors: Esox is Holbrook, Ich. S. Car. 1860,198: Esox i)lialc- 
ratus Say, Jouru. Acad. Nat. Sci. Phila. i, 416.) 
aa. Cheeks scaly; lower half of opercles hare; branchiostegals 14-16; species light- 
spotted on a darker ground. (Esox.) 
57G, E. leiciiis 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 iiart of 
the operculum. Head 3f ; depth 5; eye C-V 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 Xorth America; in the Eastern United States south to Isortheru 
Ohio ; very abui'.dant. 
(Esox lucins L. Syst. Nat. ; Ciintlier, vi, 226, aud of authors generally : Esox estor Le 
Sueur, Journ. Acad. Nat. Sci. Phila. i, 413, lsl8 : Esox estor Ciinther, vi, 228 : Esox depran- 
dus Ciinther, vi, 229 : Esox horeus Agassiz, L. Superior, 317.) 
aaa. Lower half of cheeks as well as of opercles bare ; branchiostegals 17-19 ; black- 
spotted on a lighter ground. (Mascalongus’^ Jordan.) 
577. E. iiobilior Thompson. — Miiskallimge. 
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, Eept. Ohio Fish. Com. , 1877, 92: ty^je Esox noiilior Thompson. (Latin, 
masca, mask; longus, long.) 
Bull. Nat. Mus. No. 16 23 
