. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 52 COPEPODA 7. Eucalanus Attenuatus? Dana. (PI. I figs. 6 a âc; te.\t-iigs. 10 aâe). 1S49. Calanus n. sp. Dana. Eucalanus attenuatus Dana. Dana. 1892. â â â Giesbrecht, pp. 131. 1894. â â â Th. Scott, pp. 28â29. 1S95. â â â Giesbrecht, p. 24S. iSgS. â â â Giesbrecht & Schmeil, pp. 20â21. 1901. â â â Cleve, p. 6. 1903. â -- â Norman, p. 135. 1903. â â â Cleve, p. 362. 1900. â â â Wheeler, p. 167. 1903. â â â J. C. Thompson & A. Scott, pp. 242. 1903. Eucalanus attenuatus
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 52 COPEPODA 7. Eucalanus Attenuatus? Dana. (PI. I figs. 6 a âc; te.\t-iigs. 10 aâe). 1S49. Calanus n. sp. Dana. Eucalanus attenuatus Dana. Dana. 1892. â â â Giesbrecht, pp. 131. 1894. â â â Th. Scott, pp. 28â29. 1S95. â â â Giesbrecht, p. 24S. iSgS. â â â Giesbrecht & Schmeil, pp. 20â21. 1901. â â â Cleve, p. 6. 1903. â -- â Norman, p. 135. 1903. â â â Cleve, p. 362. 1900. â â â Wheeler, p. 167. 1903. â â â J. C. Thompson & A. Scott, pp. 242. 1903. Eucalanus attenuatus Dana. J. C. Thompson, p. 15. 1905- 1905. 1905. 1906. 190S. 190S. 1909. 1911. 1910. 1912. "W'olfenden, p. 996. G. O. Sars, p. 2. Esterly, p. 133, figs. 7 aâc. Pearson, p. 7. Farran, p. 22. V. Bremen, p. 16, fig. 12. O. Pesta, p. 21. O. Pesta, p. 20. Steuer, p. 21. Sewell, p. 357. Description y$. (Stage V). Length: anterior division 3-34 -1-26 = 4-6; urosome 0-58; total length 5-18 mm. The head (text-figs. 10 a âb) is like that of Rhincalanus nasutus triangularly produced in â¢> 'â lateral as well as in dorsal view. The fifth thoracic somite (text-fig. IOC âd) is fairly well marked out, especially dorsally, and its lateral corners are slightly produced and rounded. The rostral filaments (text-fig. 10 e) are long and slender, and placed on a long bifurcate basal portion. The urosome, which is scarcely one sixth as long as the anterior portion, consists of three somites. The first (I <n) II), which does not show any trace of receptacula seminis, is longer than the two following combined; the fourth somite is completely fused with the furca, which has the longer branch on the left side. The St. 2 sin. is distinctly longer and more powerful than the other setae. The structure of the mouth appendages and natatory legs scarcely shows differences of any importance from Giesbrecht's description; the Ri 2 of the maxillipeds has only 3 instead
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
