372 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



whose type locality is Japan, I do not regard it definitely settled that 

 the yellovvfin tunas of the Pacific coast of America and of Asia are 

 identical. 



Range. — "This albacore ranges over almost the whole Pacific north 

 of the equator in the tropical and warm temperate regions. It is 

 abundant from the Galapagos to the coast of California, about the 

 Hawaiian Islands, and everywhere from the north coast of New 

 Guinea, the Moluccas, Celebes, and Borneo, northward to the 

 Bonin Islands and Japan. It is rare north of 35° N. Lat." (Herre, 

 1936, p. 107.) 



Genus SARDA Cuvier, 1829 



Body robust, somewhat compressed; head large; snout pointed; 

 mouth large; maxillary not concealed under preorbital, reaching under 

 or even beyond posterior margin of eye; teeth in jaws strong, some- 

 what compressed at base, similar teeth on palatines; none on vomer 

 or tongue; gill rakers not very numerous, generally fewer than 20 

 on lower limb of first arch; scales present on body, somewhat en- 

 larged in region of pectorals, forming a more or less distinct corselet; 

 caudal peduncle with a prominent lateral keel, and a small one below 

 and above it on base of caudal; first dorsal high anteriorly, its base 

 longer than head, with about 18 to 22 spines; interval between dorsal 

 fins very short; second dorsal and anal, elevated anteriorly, each 

 followed by 6 to 9 finlets; pectoral small, much shorter than head. 



Two species come within the scope of the present work, 



KEY TO THE SPECIES 



o. Gill rakers on lower limb of first arch 16 to 18; black stripes on upper part 



of side oblique (rarely nearly or quite horizontal) chilensis (p. 372) 



aa. Gill rakers on lower limb of first arch 9; black stripes on sides horizon- 

 tal - velox (p. 374) 



SARDA CHILENSIS (Cuvier and Valenciennes) 



BoNiTo; Chauchilla 



Pelamys chilensis Cuvier and Valenciennes, 1831, p. 163, Valparaiso, Chile 

 (original description). 



Sarda chilensis Abbott, 1899, p. 345, Callao, Peru (relationship with S. orientalis 

 and <S. sarda discussed). — Starks, 1908, p. 784, Callao, Peru. — Evermann 

 and Radcliffe, 1917, p. 55, Callao, Peru (description). —Nichols and 

 Mtjrpht, 1922, p. 506, Callao, Peru. —Meek and Hildebrand, 1923, 

 p. 318. Panama Bay (synonymy; description; relationship with S. sarda 

 discussed; range). 



Head 3.25 to 3.4; depth 4.2 to 4.9; D. XVIII-13 to 15-VII or VIII; 

 A. II, 10 to 13 — VI or VII; P. 23 or 24; vertebrae 44 (one specimen 

 dissected). 



Body moderately robust, its greatest thickness about two-thirds its 

 depth, tapering rather abruptly posteriorly ; caudal peduncle depressed, 



