. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 77 inieiis which they have referred to A. armafus are not to be distinguished from specimens from the northern seas. The gulf of Guinea, the South Atlantic, the Indian and Malayan Seas ought accor- dingly to be regarded as lying within the range of this species. Even if Sars is right, that some of Brady's specimens are identical with Boeck's species, we are not right in concluding that the species has the distribution stated by Brady (cf. A. Scott's remark p. 37). 16. Chiridius armatus Boeck. (PL II figs. 3a—e; text
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 77 inieiis which they have referred to A. armafus are not to be distinguished from specimens from the northern seas. The gulf of Guinea, the South Atlantic, the Indian and Malayan Seas ought accor- dingly to be regarded as lying within the range of this species. Even if Sars is right, that some of Brady's specimens are identical with Boeck's species, we are not right in concluding that the species has the distribution stated by Brady (cf. A. Scott's remark p. 37). 16. Chiridius armatus Boeck. (PL II figs. 3a—e; text-figs. 17 a—d). 1872. Euchate arniata n. sp. Boeck, p. 39. 1S97. nee. Pseudocalanus armatus Boeck. Vanhoffen, p. 279, fig. 16. 1900. nee. Cliiridius armatus Boeck. G. O. Sars, pp. 29—30. 1903. — — — G. O. Sars, pp. 27 — 29, pis. XV-XVI. 1903. — — — Jensen, Johansen & Le- viusen, p. 304. 1904. Pseudoaetiflius armatus Boeck. Wolfendeu, and 131, pi. IV figs. 29—31. 1905. Chiridius armatus Boeck. Farran, p. 34. 1905. — — — G. O. Sars, p. 2. 1905. — — — Th. Scott, p. 222. 1906. Pseudoaetidius annatus Boeck. Pearson, p. 11. 1907. Chiridius armatus Boeck. Koefoed & Damas, p. 408. 1908. — — — Farran, p. 30. 1908. Pseudoaetidius armatus Boeck. v. Bremen, p. 33, fig- 34- 1911. Chiridius armatus Boeck. Farran, pp. 90—91. 1913. nee — — — Stephensen, p. Description. f$. Size of specimens from Thor St. 172 measured 4-43 mm., anterior division 3-3 mm., urosome i-io mm. The smallest specimen (Thor St. 72) measured 3-6 mm. The body differred in the following features from Sars' description; laterally and beneath, the limitation between the head and first thoracic tergite is indicated; the fifth thoracic tergite, which is produced into well developed triangular points, is ^ b e short, but well distinguished (text-fig. 17 c). The genital somite is only slightly produced beneath, and the receptaculum has, as seen in fig. 17 d, a
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