324 
KAMAKICHI KISHINOUYE : 
Fig. C. External view of tlie opercle. 1, Scomber japonicus ; 2. Cybium niphonium ; 3, Sarda 
orlentalis ; 4, Gymnosarda nuda ; 5, Thunnus oriental'll ; 6, Auxis mnru. 
12 3 4 
Fig. D. External view of the subopercle, 1, Scomber japonicus ; 2, Cybium niphonitm ; 3, 
Sarda onentalis ; 4, Gymnosarda nuda ; 5, Thunnus orientalis ; 6, Neothunnus macropterus ; 
7, Katsuwonus pelamis ; S, Auxis maru. 
