186 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The above description based upon a specimen (No. 04446) 3 feet long obtained in Honolulu market, 
which is the only record of the species in these islands. It reaches a length of 3 feet and is found in 
all tropical seas, on the Atlantic coast straying as far north as Long Island. It was obtained by Poey 
at Havana and was originally described from the Keeling Islands. 
Seriola bipinnulata Quoy & Gaimard, Voy. Uranie, I, 363, pi. 61, fig. 3, 1824, Isles of Papous, or the archipelago between 
New Guinea and Celebes. 
Elagatis bipinnulatus, Bennett, Whaling Voy., II, 283, 1840 (Pacific Ocean; Indian Arch.) ; Jordan & Evermann, Fish. North 
& Mid. Amer., I, 906, 1896. 
Scriolichthys bipinnulatus, Bleeker, Nat. Tyds. Ned. Ind., VI, 1854, 196 (Batavia). 
Seriola pinnulata Poey, Memorias, II, 233, 1860, Habana. 
Seriolichthys lineolatus Day, Proc. Zool. Soe. Lond. 1867, 559, Madras. 
Elagatis pinnulatus, Jordan & Gilbert, Synopsis, 446, 1883. 
Genus 110. DECAPTERUS Bleeker. The Mackerel Scads. 
Body elongate, little compressed, almost perfectly fusiform; head short, pointed; mouth rather 
small; jaws about equal, the dentition feeble; maxillary rather broad, with a supplementary bone; 
premaxillaries protractile; scales moderate, enlarged for the whole length of the lateral line, but 
spinous and bony posteriorly only; second dorsal and anal each with a single detached finlet; free 
anal spines very strong; first dorsal well developed, persistent; pectorals comparatively short; abdo- 
men rather shorter than anal fin; gillrakers long and slender. Species numerous. Only one known 
from the Hawaiian Islands. 
Decapterus Bleeker, Natuurk. Tydschr., VIII, 417, 1855 ( lcurra ). 
Eustomatodus Gill, Proc. Ac. Nat. Sci. Pliila. 1862, 261 ( kurroides ). 
Gymnepignathus Gill, op. cit. , 261 ( macrosoma ). 
Evepigymnus Gill, op. cit., 261 ( hypodus ). 
139. Decapterus pinnulatus (Eydoux & Souleyet). “Opelu.” Plate 30. 
Head 3.9 in length; depth 5.5; eye 4. in head; snout 3; interorbital 4; maxillary 3.4; mandible 2.5; 
I), viii-i, 32-i ; A. i— 28— i ; scutes 25; scales 116. 
Body oblong, little compressed, almost perfectly fusiform; head moderate, pointed; mouth rather 
small, slightly oblique; jaws equal; a few very small teeth on palatines and tongue, no others evident; 
tongue long, narrow, rounded, free for almost entire length; eye slightly above axis, anterior; adipose 
eyelid covering nearly entire eye; interorbital wide, slightly convex; longest dorsal spine 2.2 in head, 
longest ray 3, origin of soft dorsal just over vent; caudal forked, lobes moderate; anal similar to soft 
dorsal, its longest ray 3.5 in head; ventrals 2.8 in head; pectoral scarcely falcate, 1.65 in head, base 
anterior to base of ventrals; lateral line nearly straight from origin to interdorsal space, thence gently 
descending until over about fifth anal ray, whence it continues straight to caudal fin; scales deciduous, 
enlarged for whole length of lateral line, minute on nape and forward to interorbital space; small 
embedded scales on cheek, opercle, preopercle and preorbital, rest of head naked. 
Color in alcohol, bluish silvery above, lighter below, becoming white on belly; dorsal fins and 
caudal with dark punctulations, other fins pale; upper edge of opercle with a black spot; base of 
pectoral dusky. 
The above description is based on a specimen (No. 03306) 12 inches long from Honolulu. It 
seems to be a common fish at times at Honolulu, where it is highly prized by the natives as food. It 
was first noticed by Eydoux and Souleyet. Jenkins’s specimens were taken by Dr. Wood and Mr. 
McGregor. The identification of this species with Decapterus sanctse-helense and Decapterus maruadsi as 
Steindachner has indicated, is apparently not correct. Our species is quite distinct in color in that it 
has no yellow or golden stripe or, in fact, no yellow anywhere. 
Caranx pinnulatus Eydoux & Souleyet, Voy. Bonite, Zool., I, 165, pi. 3, fig. 1, 1841, Hawaiian Islands. 
Decapterus sanctse-helense, Steindachner, Denks. Ak. Wiss. Wien, LXX, 1900, 495 (Honolulu). 
Decapterus canonoides Jenkins, Bull. U. S. Fish Comm., XXII, 1902 (Sept. 23, 1903), 442, pi. 4, Honolulu. (Type, No. 50846, 
U. S. N. M.; field No. 2737; coll. Dr. Wood). 
