. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 53 Remarks. IMost probably the specimens examined ought to be referred to Eiic. attcnuatus Dana in spite of a more produced forehead than in original specimens, and of greater size (Giesbrecht f?: 4-2—4-85 mm.)- The Thor Expedition has taken the species at the following two stations 11/7 1904 St. 183 6i°30 L. N. 17^08 L. W. Yt. 1800 M. Wire i y?; i yd". 8/6 1905 St. 72 57"52 L. N. 9°53 L. W. Yt. 1500 I\I. Wire i y $. Eucalanus atteniiatus has been recorded from the Pacific, the Mediterranean, the Indian Oc
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 53 Remarks. IMost probably the specimens examined ought to be referred to Eiic. attcnuatus Dana in spite of a more produced forehead than in original specimens, and of greater size (Giesbrecht f?: 4-2—4-85 mm.)- The Thor Expedition has taken the species at the following two stations 11/7 1904 St. 183 6i°30 L. N. 17^08 L. W. Yt. 1800 M. Wire i y?; i yd". 8/6 1905 St. 72 57"52 L. N. 9°53 L. W. Yt. 1500 I\I. Wire i y $. Eucalanus atteniiatus has been recorded from the Pacific, the Mediterranean, the Indian Ocean and the Atlantic. In the North Atlantic on the west coast of Ireland it has been found as far north as 54°57 Lat. N. io°5i L. W. at about 700 fathoms. 8. Eucalanus crassus Giesbrecht. (PI. I fig. 7; textfig. II). i888. Eucalanus crassus n, sp. Giesbrecht, p. 333. 1S92. 1898. 1901. 1902. 1903. 1903. 1904. 1905. Giesbr. Giesbrecht, p. 132, pis 4. ir, 35. — Giesbrecht & Schineil, p. 22. — Cleve, p. 6. — Wolfenden, p. 361. — J. C. Thompson and A. Scott, p. 242. — Cleve, p. 362. Wolfenden, pp. 127—12S. Wolfenden, p. 996. 1905. Eucalanns crassus Giesbr. Th. Scott, p. 222 1905. 1905. 1905. 1906. 190S. 190S. 1909. 1912. G. O. Sars, p. 2. Esterl_v, p. 134, fig. 8. Farran, p. 30. Pearson, p. 7. V. Bremen, pp. 16 — 17; fig- I3- Farran, p. 22. A. Scott, p. 19 — 20. Sewell, p. 357- Description, f?. Length: 37—4-0 nmi. The basal fused portion of the rostral filaments is com- paratively longer than figured by Giesbrecht (t. 35, fig. 26). The last thoracic somite, which is well marked out, is somewhat rounded (text-fig. 11). The abdomen consists of 3 somites only; the receptaculum seminis is large. The coecal sacs on each side are divided into smaller parts (fig. 7). In the structure of the appendages a feature of interest was observed in the structure of the external process of the basal segment of Ri, pes I, which is produced into a distinct point not seen in
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