Four fasciolariid species from Japan and the Western Pacific are examined and described. The shell consistently misidentified as Fusinus longicaudus (Lamarck, 1801) in Japanese literature is identified as F. perplexus (A. Adams, 1864). Fusinus longicaudus (Lamarck, 1801) is treated as a junior synonym of F. colus (Linnaeus, 1758). Fusinus perplexus nagasakii Grabau, 1904 is shown to be a junior synonym of F. perplexus, and the synonymy of F. inconstans Lischke, 1869 with F. perplexus is reaffirmed. Comparison is also made with F. forceps (Perry, 1811) and F. salisburyi Fulton, 1930. Lectotypes are selected for F. perplexus, F. p. nagasakii, F. inconstans, F. forceps, F. turriculus (Kiener, 1840) and F. ferrugineus Kuroda & Habe, 1960, which is provisionally retained as a valid species.
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