COMPARATIVE STUDY OF SCOMBROID FISHES. 
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the dorsals, two greenish grey longitudinal bands above the lateral line, and 
two golden longitudinal bands from the base of the pectoral. Cheeks and belly 
silvery. Two dorsals and dorsal finlets greyish, and the anal and anal fiulets 
colourless or tinged with yellow. Peritonium black. Interspinous bones of the 
second dorsal and anal are flattened, and laterally compressed. 
Fig. W. Skeleton of Bastrelliger chrysozonvjs. 3/5. 
Membrane connecting the branchiostegals is very wide. The last branchio- 
stegal is bent like the letter L. Pyloric coeca are more or less united to numer¬ 
ous groups at their root, and each group to the duodenum with a common ori¬ 
fice. In the caudal vertebrae thin paired ridges are found on the ventral side. 
It is said that shoals of this fish are observed on a calm day seething near 
the surface of shallow water, busily feeding on minute planktonic organisms. 
The fish are very alert and not easy to catch. In the Ryukyu Islands small 
individuals are caught in summer, and large ones in winter. 
Day found that the ova ripen in March. It grows to a length of ca 35 cm. 
Widely distributed in tropical and subtropical regions of the Indo-Pacific. 
Specimens from southern China, Formosa and Truck Is. were examined. 
Family CYBIIDAE Kisliinouye. 
Cybiidae, Eiskinouye, Sui. Gak. Ho, I, 6, 1915. 
Body generally elongated and compressed, but plump in the genera Sarda 
and Gymnosarda. Caudal peduncle pretty thick and nearly rounded in cross- 
section, and provided with a large keel on each side. The keel is covered with 
