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KAMAKICHI KISH1N0UYE : 
3, Sarda orienlalis ; 4, Gymnosarda nuda ; 5, Thunnus orientalis ; 6, Parathnnus mebachi ; 
7, Neothunnus macropterus ; 8, Katsuwonus pelamxs ; 9, Euthynnus yaito ; 10, Auxis mnru. 
In the Cybiidae as well as in Scombridae the surface and the outline of 
the liver are smooth. In the Thunnidae the three lobes of the liver are sub¬ 
equal, but in the Katsuwonidae the lobes of the liver are unequal in size, the 
right lobe being best developed, and the left lobe is often not well defined. 
In Thunnus (fig. 3) the external surface of the liver is marked with fine venules 
running very close together, and at the anterior middle portion of the liver, 
near the spots of emergence of hepatic veins, the liver is very thin, being 
composed of hepatic venules only. Moreover the liver is divided into many 
irregular lobules at the margin as well as at the internal or axial side, where 
