PROC. BIOL. SOC. WASH. 93(1), 1980, pp. 1^9 REVIEW OF SPECIES PREVIOUSLY REFERRED TO CERATONEREIS MIRABILIS, AND DESCRIPTIONS OF NEW SPECIES OF CERATONEREIS, NEPHTYS, AND GONIADA (POLYCHAETA) Thomas H. Perkins Abstract. — Ceratonereis tentaculata Kinberg, C. excisa (Grube), and C. singularis Tread well, previously referred to C. mirabilis Kinberg, are re-tained. Nephtys magellanica Augener is redescribed. Ceratonereis longi-cirrata, Nephtys simoni, and Goniada multidentopsis, n. spp. from Florida and nearby areas are described. A key is provided for species similar to Ceratonereis mirabilis. Introduction The present paper is one of a series of several reports in progress based primarily on specimens collected between September 1971 and July 1973 in an environmental baseline study of marine biota near the Florida Power and Light nuclear power plant at Hutchinson Island, St. Lucie County, Florida. Additional specimens from nearby areas were examined. The study area and methods and materials were described by Gallagher and Hollinger (1977). Sediments were described by Gallagher (1977), and other aspects of the physical and chemical environment were reported by Worth and Hol-linger (1977). Brief descriptions of benthic sampling stations and methods were also given by Perkins (1979). In addition to specimens deposited in the Invertebrate Reference Collec-tion of the Florida Department of Natural Resources Marine Research Lab-oratory (FSBC I), additional specimens were borrowed from the following institutions: Allan Hancock Foundation, University of Southern California, through K. Fauchald (AHF); American Museum of Natural History, through H. S. Feinberg (AMNH); Dauphin Island Sea Laboratory, Dauphin Island, Alabama, through T. S. Hopkins (DISL); Harbor Branch Foundation/Smith-sonian Institution, Ft. Pierce Bureau, Fort Pierce, Florida, through R. H. Gore and J. E. Miller (SIFP); Museum of Comparative Zoology, Harvard University, through H. W. Levi (MCZ); National Museum of Natural His-tory, Smithsonian Institution, through M. H. Pettibone, M. L. Jones, and K. Fauchald (USNM); Naturhistoriska Riksmuseet, Stockholm, through R. Olerod (NRS); Zoologisches Museum fiir Naturkunde der Humboldt-Uni-versitat zu Berlin, through G. Hartwich (ZMB); and Zoologisches Museum,
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