448 KAM.UiICHI KLSmNOlTTE: 



more thau 7 m in lengsh, and ca 200 kg in weight, nex in size to our common 

 tunny, etc. The variety called gesunaga is said to be shyer than the ordinary 

 form, not easily biting hooks, though it swims very near by and often t mches 

 tliem. The longer-finned variety is said to be plentiful iu autumn. 



The flesh is beautifully piakish, firm, and its taste is excellent. Mostly 

 consumed fresh, lieing much esteemed for "sashimi". Many immature fishes 

 are used for making " fushi " by smoking and drying after boiling iu water. 



They feed on flyiag fish, coÖer-fish, some deep-sea fish, calamaries, pteropods, 

 heteropods, Hyperina amphipods, Squillas larvae, and immatuie Squilla,, mega- 

 1 )pas of ci"abs, etc. 



The spawning season of Neofhunnus macropterud is not yet known. Some 

 specimens examined in autumu at Kyushyu are said to have contained large 

 ovaiies. 



This species is allied to Thynmis albacora Lowe, so far as its external 

 characters are concerned, so that Günthek and Cunningham consider the 

 former to be identical with the latter; but as in the case of the other exotic 

 species the anatomy of T/mnmis albacora has been little studied, therefore it 

 is impossible to determine the question. 



Neothunnus rarus (Kishiuouye). 



Koshinaga, bintsuke, hashibi, seiyoshibi, shii-oshibi, tongari. 



Figs. 24, 48, 64. 



Thunnus rarm, Kishiuouye, Sui. Gak. Ho, I, 2S, PI. 1, Fig. 13, 1915. 



D. 13, 14, 9. A. 14, 8. GUI-rakers 5-6 + 15-17. Scales ca. 220. 



Body broad, head and eyes oömparatively small, snout short, and caudal 

 I)3rtioü elongated. Scales minute. Ciu've of the lateral line above the pectoral 

 very gentle. The number of gill-rakers is minimum iu our Plecostean fishes. 

 Pectorals broad, lanceolate, scarcely reaching to the vertical from tlie last 

 but one spine of the first dors:T,l. Second dorsal and the anal are a little 

 higher than the first dorsal. 



Right lobe of the liver longest. Air-bladder absent. This is the only 

 kind of the Japanese tunnies, winch lacks it. The posterior eud of the 

 kidneys is very narrow and extends nearly to the segment of the fifteenth 

 vertebra. Uretere ai'e united to a common duct imder the 12th vertebra. 



