450 
PACIFIC SCIENCE, Vol. XIX, October 1965 
mm in standard length. Other supplementary 
characters confirmed the specimens as being al- 
bacore. The juveniles were described and counts 
and measurements were made. 
The flattened haemal spine and full adult 
complement of gill rakers are developed rela- 
tively early in the life of the albacore. Certain 
other morphological features, including the 
angle the posterior margin of the basioccipital 
makes with the axis of the vertebral column, 
the orientation of the parapophyses on the ver- 
tebrae preceding the ninth vertebra, the orienta- 
tion of the bones of the first haemal arch, and 
the angle the first haemal arch makes with the 
axis of the vertebral column, seem to develop 
more slowly and assume their adult form later 
in the life of the albacore. 
A new distribution record for juvenile alba- 
core was established with the discovery of these 
juveniles, demonstrating new or extending 
known spawning grounds for albacore in the 
Pacific Ocean. These captures of juvenile alba- 
core support the conclusions of studies made 
on albacore spawning based on gonads, which 
indicated that albacore spawn in broad areas 
of the tropical and subtropical waters of the 
North and South Pacific Oceans. 
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Clemens, H. B. 1961. The migration, age, and 
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Matsumoto, W. M. 1961. Collection and de- 
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I960. Albacore migration and growth 
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— and R. N. Uchida. 1959. Sexual ma- 
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1963. A model of the migration of 
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Ueyanagi, S. 1957. Spawning of the albacore 
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