V^II. — The Marine and Terrestrial Isorons of the Bermudas, AViTH Descriptions of Neav Genera and Species. By Harriet Richardson. [Collaborator, Smithsonian Institution.] 1. The Marine Isopods of the Bermudas, with descriptions of thirteen Neto Species and three Neio Genera. There is almost no literature relating to the Marine Isopods of the Bermudas. In 1891 Ives* described and figured a new species of Cyrnodocea from the Bermudas ( C. bermudensis), which has since been referred to the genus Dynamene. Several species of wide-spread distribution have been recorded from the Bermudas, as for example, Idotea marina (Linnaeus), speci-mens of which are in the Smithsonian Institution. It was taken in abundance by the Yale party in 1901, in Hamilton Harbor. Spence Batef mentions, without any description, a species of Bopyrus from the Bermudas, parasitic on Latreutes ensiferus (Milne-Edwards), which is without doubt, identical with Bopyroides latreuticola Gissler, found on the same host at Beaufort, North Carolina. The material for the present paper is the result of three expedi-tions to the Bermudas ; one in ISVG-'Z, when Prof. George Brown Goode collected a number of Isopods ; one in 1898, undertaken by Prof. A. E. Verrill and party ; and another in the spring of 1901, by Prof. A. E. Verrill and Mr. A. H. Verrill. These collections contain both known and unknown species. Among the known species are to be mentioned specimens of Dyna-mene bermudensis Ives, and Idotea marina (Linnteus), already recorded from the Bermudas. Also specimens of Corallana quadricornis Hansen, Alcirona krebsli Hansen, Nerocila acuminata Schioedte and Meinert, Dyna-me7ie perforata Moore, and Ciliccea caudata (Say), common to West *Proc. Philad. Acad. Nat. Sci., 1891, p. 194. t Report of the Scientific Results of the Exp. Voyage of H. M. S. Challenger, xxiv, p. 583, 1888.