170 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
lateral line, these somewhat reticulated and inclosing paler areas; middle and lower part of side paler, 
with small dark spots; belly pale, with small round dark spots; axil dark. 
Color in life (No. 035116), upper half of head and body blue, with brilliant silvery and blue reflec¬ 
tions; lower half white, with metallic reflections; back and upper part of side with more than 30 
transverse zigzag dark bauds; lower half covered with numerous inconspicuous roundish and oval 
Fig. 62 .—Scomber japonicus Houttuyn; after Jordan and Evermann. 
dusky spots; spinous dorsal transparent; soft dorsal slightly dusky; anal whitish; ventrals white, with 
reddish base; pectoral dusky; caudal dusky, with the edge yellowish. 
The above description based chiefly upon a specimen (No. 04022) 15.75 inches long, taken at Hilo. 
One other was obtained at Hilo. The collection contains 2 examples obtained at Honolulu August S 
and 13, and another was seen in the Honolulu market August 13. 
This mackerel is not often seen among the Hawaiian Islands. The only specimens known from 
there are those here noted. It is apparently identical with the chub mackerel of the Atlantic anil 
with the common Japanese s aba. 
Scomber japonicus Houttuyn, Verhand. Holt. Maatsch. Haarl., XX, 1782,331, Japan; Jordan & Evermann, Amer. Food and 
Game Fishes, 276, 1902, with figure; Jordan A Snyder Proc. tJ. S. Nat. Mus., XXIII, 1901, 745, 747. 
Scomber aiiratus Houttuyn, 1. <•., 333, Japan. 
Scomber colim Gmelin, Kyst. Nnl., 1329, 1788, Sardinia; Dresslar & Fesler, Bull. U. S. Fish Comm., VII, 1887, 432, PI. II, 
Jordan ck Evermann, Fish. North & Mid. Amer., I, 866, PI. CXXXIII, fig. 364, 1S96. 
Scomber lacertus Walbaum, Art. Pise,., 209, 1792, Sardinia. 
Scomber jmeumatophorns he la ltoche, Ann. Mus. Nat. Hist. Paris, XIII, 1809, 315 and 334, Balearic Islands. 
Scomber macmphthalmiix Rafinesque, Indiee, 15, 1810, Palermo. 
Scomber grez Mitchill, Trans. Lit. and Philos, Soe. N. V. 1815, 422, New York. 
Scomber maculatm Couch, Ann. Mag. Nat. Hist., V, 1832, 22, England. 
Scomber undulalus Swainson, Nat. Hist. Fishes, II, 409, 1839, Sicily. 
Scomber (iracUte Swainson, op. cit., II, 410, 1S39. Sicily. 
Scomber dieyo Ayres, Proc. Cal. Ac. Sci. 1856,101, Santa Barbara. 
Scomber dekayi Storer, Hist. Fishes Mass., 130, pi. 11. fig. 1, 1S53, Massachusetts coast. 
Genus 98. AUXIS Cuvier. The Frigate Mackerels. 
Body oblong, plump, mostly naked posteriorly, anteriorly covered with small scales, those of the 
pectoral region enlarged, forming a corselet; snout very short, conical, scarcely compressed; mouth 
rather small, the jaws equal; teeth very small, mostly in a single series, on the jaws only; tail very 
slender, depressed, with a rather large keel on each side; flrst dorsal short, separated from the second 
by a considerable interspace; second dorsal and anal small, each with 7 or 8 finlets; pectorals and ven¬ 
trals small; no air-bladder; branchiostegals 7; pyloric coeca dendritical; gillrakers very long and slender, 
numerous; vertebrae 39 in number, peculiarly modified, essentially as in Gymnosarda. One species, 
pelagic, widely distributed. 
Aurcis Cuvier, Rogue Animal, Ed. 2, Vol. II, 199, 1829 (rocha —t.hazard). 
