460 KAMAKICHI KISHINOUXE: 



species liy the presence of about thi-ee longitudiual cljivk lines or mtlicr 

 bands in the nsiked portion above the lateral line. One row of teetli on the 

 vomer and palatines as in Euthynnm yaito. In the new species the head is 

 larger than in the other species. The specimen examined is 48 cm in the 

 tjtal length. In the thoracic pirt there are some spots or rather veiy short 

 bands. Caudal portioii very slender and short. 



Genus Auxis Cuvier. 



Auxis Cuvier, Eegne Anim. U, 119, 1829. 



Body rounded in cross-section, fusiform, and more elongated than in Ka- 

 suwonus and Euthynnvs. Caudal portion remarkably short, while the precau- 

 dal portion h very long. Snout short, mouth small. Teeth in both jaws only. 

 Fins small, especially the second dorsal, anal, and caudal. Postenor portion of 

 the first dorsal has disappeared, and the fiu is nearly triangular in sh;\pe, 

 and is not continuous to the second dorsal. In the median prolongation of the 

 corselet, we find no indentation at the ventral margin behind the pectorals. Later- 

 al line slightly curved with small undulations. Tongue flat, smooth, and silvery. 



Basioccipital together with the parasphenoid form paired horn-like process- 

 es behind to support the first vertebra above. Esoecipitals fused to one piece 

 of bone, with a prominent dorsal median crest, just l)elo\v the supraoccipital 

 crest, thus afibrdiug a strong hold for the insertion of the lateral muscles. 

 Deep transverse depression along the suhire between the prootic and jilisphe- 

 noid, corresponding to the ventral gi'oove in the optic lobe of the brain. At the 

 anterior border of the depression the alisphenoid is produced to a shelf to 

 pai-tly cover the depression. Pterotic process long and broad horizontally. The 

 sphenotic does not appear in the dorsal side of the skull. Antero-suj^erior 

 corner of the subopercle produced. One pair of ausiUary intermuscular bones 

 on the coalesced exoccipitals, just above the foramen for the spinal cord. Some 

 intermuscular bones behind that of the 8th vertebra are divided into two por- 

 tions and are connected by a ligament. 



The first vertebra is not closely coalesced to the skull, and the upper 

 posterior zygapophyses are long and large for the attachment of the clavicular 

 ligamoait. The neural proce33 of the first vei'tebra is weak and small. In tho 



