. Bulletin - United States National Museum. Science. A REVIEW OF THE MYSIDACEA 199 margin are not grouped, densely packed and of equal size. (7) The fourth pleopod of the male (fig. 78, b) has the proximal joint of the exopod six times as long as the distal joint; terminal setae one-quarter longer than the distal joint. This species was described by Czerniavsky (1882b) from specimens taken in the North Pacific in the Gulf of Castries. It was later re- corded by Dershavin (1913), without comment, from Kamchatka and. Figure 78.—Neomysis mirabilis (Czerniavksy): a, Antennal scale and peduncle, X
. Bulletin - United States National Museum. Science. A REVIEW OF THE MYSIDACEA 199 margin are not grouped, densely packed and of equal size. (7) The fourth pleopod of the male (fig. 78, b) has the proximal joint of the exopod six times as long as the distal joint; terminal setae one-quarter longer than the distal joint. This species was described by Czerniavsky (1882b) from specimens taken in the North Pacific in the Gulf of Castries. It was later re- corded by Dershavin (1913), without comment, from Kamchatka and. Figure 78.—Neomysis mirabilis (Czerniavksy): a, Antennal scale and peduncle, X 22%; b, fourth pleopod of male, X 26%; c, telson of typical form, X 22%; d, telson of a not uncommon variety, X 30%. by Birstein (1939) from Asiatic Russia. Birstein gave a figure of the telson which agrees with that of the present material. Ii (1936a) has described a species, N. nakazawai, which appears to me to be indistin- guishable from N. mirabilis. He makes no reference whatsoever to the latter species, and I can only suppose that he overlooked Czerniavsky's description, not perhaps recognizing that the genus Heteromysis of Czerniavsky, of which this species is the type, is only 893476—51- -14. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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