446 
KAMAKICHI KISHIK OüYE : 
Neothunnus macropterus (Schlegel). 
Kihata or kiwada, gesunaga, hashibi, hatsu, hirenaga, itoshibi, 
kinhire, kimedi (immature). 
Figs. 13, 19, 23, 45, 51. 
Thynnus macropterus, Schlegel, Fauna Japon. Poiss. 98, Tab. 51 ; Day, Fish. India, 253, 
1802. 
Orcynus macropterus, Kilahara, Joum. Fish. Bur. VI, 2, PI. 2, Fig. 3, 1897. 
Germo macropterus, Jordan & Seale, Bull. Bur. Fish. XXV, 228, 1906, 
Thunnus macropterus. Kislinouye, Sui. Gak. Ho, I, 19, PI. 1, Fig. 12, 1915. 
D. 13, 14, 9. A. 14-15, 8-9. Gill-rakers 9 + 21. Scales ca. 270. 
Body fusiform, elongated, head small, and the caudal portion long. 
Scales minute. Pectorals long, pass beyond the origin of the second dorsal, 
their dorsal and ventral outlines are nearly parallel to each other, and are 
connected by a short oblique side near the distal end. The second dorsal and 
the anal are much elongated, especially in a variety named itoshibi or 
gesunaga, the tips of these fins are whitish and reach to the base of the 
caudal. So far as I have examined there is no marked difference in anatomical 
structure between the long finned variety and the ordinary form, except in 
the length of the second dorsal and anal fins. 
No venules on the surface of the liver, the left lobe of which is sometimes 
divided into two, and the right lobe is longer than the other. Pyloric coeca as a 
mass is shorter than the stomach. Intestine rather short, the third bend 
scarcely reaching the middle between the first and the second. The rectum 
is also short. Air-bladder narrow and long not divided at the anterior end. 
Thick strong connective tissue protects the ventral part of the air-bladder. 
Venules to the cutaneous vein are arranged in one row on the side 
towards the lateral median line. These venules run over the external side 
of the cutaneous artery, after uniting many fine venules. Arterioles from 
the cutaneous artery are arranged in one or two alternate rows from the 
side near the lateral median line. Cutaneous blood-vessels are found at the 
surface of the lateral muscle behind the origin of the first dorsal. A cutaneous 
vein on each side of the body pours separately to the Cuvierian duct of the 
respective side, or is united to the cardinal vein below the ninth vertebra, 
and in the kidneys. The cardinal vein joins the right Cuvierian duct. In 
the haemal caual the cardinal vein is united with a plexus of short transverse 
