Discovery reports (1956) Discovery reports discoveryreports27inst Year: 1956 SYSTEMATIC AND BIOLOGICAL ACCOUNT 61 Stem (? contracted). Air-sac oblong, 6x2 mm.; nectosome 14x2 mm.; siphosome 23 cm. long, 4-6 mm. measured dorso-ventrally, 3-7 mm. side to side, very muscular, segmented. Gastrozooids and tentilla missing. Other appendages (not well preserved) in a ventral band 2-7-3-7 mm- wide. I take this opportunity to publish a second record of the capture of Marrus (Stephanomia) orthocanna Kramp by ' Scotia' on 31 August 1951 in haul 688. Locality: 590 50' N., 11° 24' W., two loose necto- ph
Discovery reports (1956) Discovery reports discoveryreports27inst Year: 1956 SYSTEMATIC AND BIOLOGICAL ACCOUNT 61 Stem (? contracted). Air-sac oblong, 6x2 mm.; nectosome 14x2 mm.; siphosome 23 cm. long, 4-6 mm. measured dorso-ventrally, 3-7 mm. side to side, very muscular, segmented. Gastrozooids and tentilla missing. Other appendages (not well preserved) in a ventral band 2-7-3-7 mm- wide. I take this opportunity to publish a second record of the capture of Marrus (Stephanomia) orthocanna Kramp by ' Scotia' on 31 August 1951 in haul 688. Locality: 590 50' N., 11° 24' W., two loose necto- phores, which I have compared with type material. The figured holotype of Marrus orthocannoides bears the Brit. Mus. (Nat. Hist.) Register No. 1952. 11. 19. 4. Agalma elegans (Sars), 1846. Agalmopsis sarsii Kolliker, 1S536. I have found no adult specimens, not even loose nectophores, of this species amongst the 20,000 siphonophore specimens that I have examined from the Gulf of Aden, or from the Somali or Arabian basins of the Indian Ocean. But in November 1950 and January 1951 'Manihine' took eighty-four small nectophores at five stations in the Red Sea (16-17 January 1951) at a distance of from 5 to 35 miles east of Sanganeb Lighthouse, off Port Sudan, where the temperature must have been about 21-5-22° C. Also 'Discovery II' took a young specimen at Station 2906 in the Red Sea. It had two gastrozooids (no tentilla are visible) and two nectophores 4 mm. in diameter, which I have compared carefully with Mediterranean specimens (Text-fig. 24). The only other specimens that I have found Text-fig. 24. Side and upper views of nectophore of Agalma elegans from Villefranche, x 8. in the whole of the vast amount of' Discovery' material from the Indian or Atlantic Oceans were some well-preserved young ones, of typical form taken at Station 273, differing in no way from those that I have examined from Villefranche, the Celtic Sea ( Plymouth 'Mackerel Cruises'), Valentia harbou
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