抄録
Karyological studies in four species of filefish belonging to Balistidae (Stephanolepis cirrhifer, S. japonicus, Paramonacanthus oblongus, and Navodon modestus) were carried out. Diploid chromosome numbers in Stephanolepis cirrhifer, S. japonicus, and Paramonacanthus oblongus, were 34, but in Navodon modestus, 40. All chromosomes in these four species were acrocentrics. In three species with 2n=34, the secondary constriction was found in one chromosome pair differing from each other.
