406 
KAMAKICHI KISHTÎsOUYE: 
In olden times fishermen attracted fish with torch-light, but at present 
electric lamps, acetylene light, etc. are used. The light attracts many planctonic 
animals near the surface of the sea, and they in turn attract the mackerel, and 
other animals such as sam'el, calamaries, etc., gradually towards the surface of 
the sea. Thus the time used in catching the mackerel is greatly economised. 
Besides light, tole bait is much used to attract the fish. Salted mantis-shrimp 
is chiefly used for the purpose. Long lines and drift nets are extensively used in 
the Japan Sea. Encircling seines, such as the purse seine and “ shibari-ami ” 
are chiefly used in the southern part of Chosen. 
The mackerel fishery is carried on on a rather small scale, with hand lines, 
long lines, or drift nets. The hand-line is most extensively used. The gear 
consists of a line of about 100 m, two brass outriggers or spreaders, each ca 
30 cm long, spreading from both sides of a conical lead, three to four hundsed 
gr in weight. A worm-gut snood 2 m long is generally fastened to each out¬ 
rigger, with a small hook at the distal end. A small bag is usually fastened 
to the lead to hold tole bait. Immature mackerel or yearlings are caught in 
large quantities with haul-seines in shallow waters. 
Genus Rastrelliger Jordan k Starks. 
Rastrelliger, Jordan & Dickerson, 1908. 
Body deeply compressed. Mouth large, maxillary nearly reaching the 
posterior edge of the eye. Dentition feeble, the vomer and palatines toothless. 
Gillrakers exceedingly long and numerous. Intestine very long, bent several 
times. Found in tropical and subtropical regions of the Inclo-Pacific. 
Rastrelliger chrysozonus (Büppel). 
Gurukun (Ryukyu Is.), murehji (Naha, Ryukyu). 
Fig 63. 
Seamier chrysozonus Rappel, N. W. Fische, 37, Taf. XT, Fig. 1, 1838, 
Scomber microlepidotus. Day, Fish. India, 250, PI. LIV, Figs. 3—6, 1875—78; Kitahara, 
Journ. Fish. Bureau, VI, 5, PI. Ill, Fig. 5, 1897. 
Scomber kanagurta, Jordan and Richardson, Mem. Carnegie Mus., 1909. 
Rastrelliger chrysozonus, Kishinouye, Sui, Gaku. Ho, I, 8, 1915. 
D. 10, 12, 5. A. 12, 5. Vert. 13 + 18. 
In freshly preserved specimens in formalin the back is bluish with greenish 
lustre in the anterior pari, a row of greyish dots on each side of the base of 
