Abstract
27 species of apogonid fishes were collected from southern Japan, of which ten species are new to Japanese waters.The widest extention of range among these new records is shown by Apogon semiornatus hitherto unknown east of the Seychelles.Most of the others have previously been known north to the Philippines.Their occurence in Japanese waters is believed to accentuate the homogeneity of the Indo-West Pacific as a whole in fish distribution.The vicinity of Miyake-jima seems to be the northern limit for the establishment of some of the tropical apogonids.Ecology and diagnostic features of several apogonids are discussed and a new species in the genus Apogon from Ishigaki-jima is described.
