. 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. 688 DEPTHS OF THE OCEAN to enable us to find all degrees of light-intensity, at all events during summer. Paraliparis bathybii, the large black bathypelagic fish found by us in the Norwegian Sea (see Fig. 107, p. 127), possesses well-developed eyes, although it lives in deep water and undoubtedly in surroundings just as devoid of daylight as does Cyclo- thone microdon. The same remark applies to
. 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. 688 DEPTHS OF THE OCEAN to enable us to find all degrees of light-intensity, at all events during summer. Paraliparis bathybii, the large black bathypelagic fish found by us in the Norwegian Sea (see Fig. 107, p. 127), possesses well-developed eyes, although it lives in deep water and undoubtedly in surroundings just as devoid of daylight as does Cyclo- thone microdon. The same remark applies to Rhodichthys regina. Is it the rich phosphorescent pel- agic fauna peculiar to the coast waters and the boreal area which renders light-organs useless and eyes useful to the fishes of these regions? Is it the case that the peculiar light-organs and the wonderful eyes can develop only in warm oceanic waters of low specific gravity ? Are all these features only- special adaptations to special and definite conditions, like the splendid colours of animals in tropical lands ? Are the small light-organs and the minute organs of vision peculiar to the deep, dark, and cold oceanic waters only rudimentary organs, which are no longer of vital importance to the fishes? Are they to be considered as evidence that these fishes are descended from ancestors living under entirely different conditions in lesser depths ?. 6 "5. 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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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
