. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. Fig. 403. Halicreas rotundatum, Vanhoffen (^). (From Vanhoffen.) Fig. 402. Agliscra ignea, Vanhoffen (f-). (From Vanhoffen.) reach the 40th or 50th degree of latitude, where we find some small forms living entirely in the upper layers of the Atlantic and Indian Oceans, as for instance Rhopalonema velatum, Aglaura ketnistoma, and Liriope tetraphylla (Fig. 400); they are devoid of colour or only fa
. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. Fig. 403. Halicreas rotundatum, Vanhoffen (^). (From Vanhoffen.) Fig. 402. Agliscra ignea, Vanhoffen (f-). (From Vanhoffen.) reach the 40th or 50th degree of latitude, where we find some small forms living entirely in the upper layers of the Atlantic and Indian Oceans, as for instance Rhopalonema velatum, Aglaura ketnistoma, and Liriope tetraphylla (Fig. 400); they are devoid of colour or only faintly tinted, some of them being only a few millimetres in diameter. Others are genuine deep-sea forms, found only below 600 or 1000 metres. Crossota brunnea (Fig. 401) is dark brownish, Agliscra ignea (Fig. 402) is a flaring red, and Halicreas rotundatum (Fig. 403) is distinguished by bright red markings. The Narcomedusae are oceanic forms, including some small colourless surface forms and strongly tinted (brown) deep-sea forms. 1 This species was taken by me in a deep haul in the Norwegian Sea, and Vanhoffen placed it very near to the tropical species Crossota brunnea, see Wiss. Ergeb. " Va/divia" Expedition, Bd. 3, 1902 ; and "Die Fauna und Flora Gronlands," Gronland Expedition (Berlin, 1897).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Murray, John, Sir, 1841-1914; Hjort, Johan, 1869-. London Macmillan
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