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Show 128 DR. G. IIERBERT FOWLER OX TIIE [Feb. 3, recorded from the Antarctic region, as well as from the Gulf- Stream proper, the Sargasso Sea, and South Equatorial Drift \ E uthemisto libellula Mandt. A single specimen in haul 15 d at the surface at midnight. It is widely distributed over the Arctic Seas, but, unlike the two foregoing species, was not taken in southern waters by the 4 National.' Scixa borealis G. 0 . Sars. A single specimen from 13 <7 (465 to 335 fathoms) was accidentally included among the Copepoda sent to Mr. Thompson and identified by Mr. A. 0 .Walker. According to Canon Norman 2, the distribution of this species is mesoplanktonic, mostly northern, but also in the Bay of Biscay (960 metres). It reaches to about S c h i z o p o d a . The Schizopoda captured belong exclusively to the Euphausiacea, and are referable to only three species. Several forms which might have been reasonably expected among the captures were absent. A list of the British species with their distribution is given by Canon Norman, in his paper on British Lophogastridse and Euphausiidse 4. T hysanoessa longicaudata Kroyer. A considerable number of specimens of this species were captured: it appeared to be the commonest Scliizopod of the Faeroe Channel at the time. The synonymy appears to be Thysanopoda longicaudata Kroyer = Thysanoessa tenera Sars = Thysanoessa longicaudata of Hansen, Norman, Ortmann, &c. The species ranges from the West Coast of Norway right across to Greenland and into the Labrador current; the 4 National9 J ceased to take it (after almost daily captures up to that moment) from the date of entering the warm water of the Gulf-Stream (‘ Florida-strom '). Sars °, who described the species from deep water in the Varanger Fjord, records it also as from the surface at four stations between Norway and Jan Mayen on the cruise of the 4 Voringen ' 7. It appears, therefore, to be essentially a cold-water species, an Arctic type-form, and was captured by the 4 Fram 7 d. It has, however, been recorded twice from British coasts 3. 1 Vosseler : Amphipoden der Plankton-Expedition, p. 86. 2 A. M. Norman: Ann. Mag. N. H. (7) v. p. 135. 3 F. Nansen, op. cit. p. 19. 4 A. M. Norman: Ann. Mag. Nat. Hist. (6) ix. p. 454. A. Ortmann : ‘ Decapoden und Schizopoden der Plankton-Expedition,' p. 14. |
