180 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
in warm seas, often moving northward in summer, like the Scombridx. They swim swiftly, often 
with the dorsal fin above the surface of the water. Most of the species are widely distributed, and 
nearly all are valued as food. 
a. Premaxillaries not protractile Scombgr aides, p. 180 
an. Premaxillaries protractile. 
b. Anal fin much shorter than the soft dorsal, its base not longer than the abdomen. 
c. Dorsal and anal fins without finlets. 
d. Dorsal spines 4 or 5, the connecting membrane disappearing with age Naucrates, p. 181 
dd. Dorsal spines about 7, the connecting membrane persistent Seriola, p. 182 
<r. Dorsal and anal fins each with a two-rayed detached finlet Elagatix, p. 185 
bb. Anal fin about as long as soft dorsal, its base longer than abdomen. 
e. Dorsal and anal fins each with a single detached finlet Decapterux , p. 180 
ce. Dorsal and anal fins without finlets. 
/. Shoulder-girdle with a deep cross furrow at its junction with the isthmus, above which is a fleshy projec- 
tion; body elongate Trachurops, p. 187 
ff. Shoulder-girdle normal, its surface even; body deeper. 
g. Teeth of jaws not forming villiform bands, but variously in one or more series Carangux, p. 188 
gg. Teeth of jaws, if present, forming villiform bands. 
h. No teeth on vomer or palatines; teeth of jaws wanting in adults, sometimes appearing in young 
Caranx , p. 197 
hh. Teeth present on vomer and palatines; teeth of jaws of adults present, persistent. 
i. Body oblong, not much elevated; none of the dorsal rays filamentous Carangoides, p. i98 
ii. Body rhomboid, deep, strongly compressed; first rays of dorsal more or less filamentous Aleclis, p. 200 
Genus 106. SCOMBEROIDES Lacepede. 
Body compressed, oblong or lanceolate; caudal peduncle slender, not keeled; head short, com- 
pressed, acute; occipital keel sharp; mouth rather large, with small, sharp teeth in bands on jaws, 
tongue, vomer, palatines, and pterygoids; jaws about equal, the upper not protractile, except in the 
very young, in which it is movable as in other Carangidx; maxillary very narrow, with a supplemental 
bone; gillrakers rather long; scales rather narrow, but more or less normally developed, embedded in 
the skin at different angles; lateral line unarmed; dorsal spines rather strong, 7 in number, nearly 
free in the adult; second dorsal very long, its posterior rays pencillated and nearly or quite discon- 
nected, forming finlets; anal rather longer than soft dorsal, much larger than the abdomen, its last 
rays forming similar finlets; anal spines strong; ventral fins depressible in a groove; pectoral fins very 
short. Species few. 
Scomberoides Lacepcde, Hist. Nat. Poiss., Ill, 192,1801 (Coryphxna scomberoides). 
Ckorinemus Cuvier & Valenciennes, Hist. Nat. Poiss., VIII, 367, 1831 (eommersonianus) . ' 
a. Body deep, fusiform, depth 3.5 in length tolooparah, p. 180 
aa. Body more slender, depth 4.3 in length sancti-vctri, p. 181 
133. Scomberoides tolooparah (Riippell). “Lae.” 
Head 4.25; depth 3.5; eye 4; snout 3.5; interorbital 3.75; maxillary 1.9; D. vii-i, 19; A. ii-i, 18. 
Body fusiform, compressed; head moderate; snout rather narrow, pointed; jaws subequal, lower 
the longer and prominent; mouth slightly oblique, rather large; edge of upper lip on a line with 
upper edge of pupil; small bands of setiform teeth on vomer, palatines, and tongue, those on lower 
jaw slightly larger and in 2 rows, not banded anteriorly, those in upper jaw similar but smaller, in 
1 row, banded anteriorly; maxillary reaching slightly past posterior edge of pupil; eye slightly above 
median line, anterior, not quite as long as snout; dorsal spines broad, flat, low, longest about equal to 
eye, tip of last spine reaching origin of soft dorsal; longest soft dorsal ray 2 in head; caudal deeply 
forked, lobes equal; anal similar to soft dorsal, its first ray under origin of soft dorsal, longest ray 2.4 
in head; tip of ventral reaching vent, and equal to tip of pectoral, 2.2 in head; pectoral 2 in head, its 
anterior base slightly in advance of base of ventral; lateral line slightly arched above pectoral fin, 
descending to line under base of soft dorsal, thence straight to base of caudal. 
Color in alcohol, bluish silvery above, white silvery below; 8 or 10 spots about size of pupil, 
extending on either side of lateral line to middle of soft dorsal; a dark blotch on upper anterior soft 
dorsal, similar spots on each dorsal ray; caudal dusky, other fins pale; no spots on anal. 
The above description based chiefly on a specimen (No. 02927) 8 inches long from Honolulu. 
