442 BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Type: Scomber regalis Bloch — Scomberomorus jplumierii Lac^pede. 
Etymology: axopPpoq = mackerel ; opopoq, bordering on, near. 
This genus contains numerous species which are more decidedly shore 
fishes than any of the others of the family, and consequently of narrower 
distribution. The name Scomberomorus must take the place of Cybium , 
the generic name heretofore most used by European authors. 
ANALYSIS OF SPECIES OF SCOMBEROMORUS. 
a. Gill-rakers rather long, slender, more than 8 below angle ; dorsal spines 17 or 18 ; 
lateral line slightly wavy, descending obliquely. 
b. Teeth small, slightly compressed, about 50 in each jaw ; body comparatively 
little compressed ; mouth oblique ; gill-rakers long and slender, 18 below 
angle; premaxi lary short, not reaching to posterior margin of eye; caudal 
peduncle nearly cylindrical; head a little depressed, about 5 in length; 
ventral fins short ; pectorals inserted slightly above axis, and about 8 in 
length ; depth of body equal to length of head. Color of the male dark 
steel-blue above, becoming silvery on sides; the female a shade lighter 
above, two rows of round bronze spots on sides equal to pupil. D. xvii-16- 
viii ; A. i, 16 -viii Concolor, 11. 
bb. Teeth strong, triangular, compressed ; body somewhat compressed ; gill-rakers 
long and slender, 8 to 12 below angle. 
c. Color bluish above, silvery on sides and marked with many round bronze 
spots; no stripes on sides; head pointed, little compressed; teeth, 30 to 32 
in each jaw ; scales on base of pectorals; pectorals, about 5| in body; eye, 
2 in snout; interdorsal space equal to tbe diameter of the eye; pectorals 
inserted a little above center of orbit; gill-rakers about 9 below angle. 
Head 4f ; depth 5. D. xvm-17-ix; A. ii, 18-viii Maculatus, 12. 
cc. Color silvery; sides with two black stripes crossing lateral line under soft 
dorsal, posteriorly b:oken up into irregular spots; snout somewhat convex 
in profile; lateral line wavy along the tail; teeth about 40 in each jaw; 
pectorals, 5£ in body; eye 2£ in snout; interdorsal space less than half 
diameter of eye; pectorals inserted a little below the center of orbit; gill- 
rakers slender, about 11 below angle. Head ; depth 4^. D. xvm-16- 
vm ; A. ii, 14-viii - Regalis, 13. 
aa. Gill-rakers short, thick, less than 8 below angle ; dorsal spines 14 or 15 ; lateral 
line making an abrupt descent beneath soft dorsal; teeth large, com- 
pressed, about 30 in each jaw; anterior part of spinous dorsal without 
black blotch; pectorals 5 in body; eye 2 in snout; interdorsal spaceless 
than eye. Color of adult, iron gray, nearly or quite immaculate ; young 
with yellowish spots. Head 5; depth 6. D. xv-15-vm; A. ii, 15-vm 
Cavalla, 14. 
11. SCOMBEROMORUS CONCOLOR. 
(Monterey Mackerel.) 
Chriomitra concolor Lockington, Proc. Acad. Nat. Sci. Phila., 1879, 133 (Monterey); 
Lockington, Report Cal. Fish Comm. (1878-’79), 1881,34 (Monterey). 
Scomberomorus concolor Jordan & Gilbert, Proc. U. S. Nat. Mus., 1880, 456 (Monterey; 
no description); Jordan & Jouy, Proc. U. S. Nat. Mus., 1881, 13 (Soquel, 
Cal. ; no description) ; Jordan & Gilbert, Proc. U. S. Nat. Mus., 1881, 45 (Mon- 
terey Bay); Jordan & Gilbert, Syn. Fishes N. A., 1883,425 (Monterey Bay) ; 
Jordan, Nat. Hist. Aquat. Anim., 1884, 316 (Monterey); Meek & Newland, 
Proc. Acad. Nat. Sci. Phila., 1884, 233 (Soquel). 
