. 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. "Michael Sars" North Atlantic Deep-sea Expedition (1910); Oceanography; North Atlantic Ocean. PELAGIC ANIMAL LIFE 607 with surface tow-nets. The beautiful Httle Hippocavipus (see Fig. 71, p. 89) was taken between the Canaries and the Azores. The sub-order Percesoces contains several important and interesting surface-fish. To the family Scombresocidae belong the gar-pike {Belone), the genus Scombreso
. 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. "Michael Sars" North Atlantic Deep-sea Expedition (1910); Oceanography; North Atlantic Ocean. PELAGIC ANIMAL LIFE 607 with surface tow-nets. The beautiful Httle Hippocavipus (see Fig. 71, p. 89) was taken between the Canaries and the Azores. The sub-order Percesoces contains several important and interesting surface-fish. To the family Scombresocidae belong the gar-pike {Belone), the genus Scombresox, and the flying-fish of the genus Exocoetus. Sco7nbresox sauriis attains a length of 50 cm., and resembles the gar- pike, but does not approach so near the coasts, nor does it extend so far north ; it is known from the Atlantic coasts of North America, Northern Europe and Africa. Day records a capture of icxD,ooo individuals in one haul off the British shores. Only very young specimens were taken by the " Michael Sars" (see Chapter X.), but these are very interesting, because they prove that the species occurs pelagically right across the Atlantic. Flying-fishes were constantly observed on our southern. Fig. 464. datus, Giinth. Nat. size, 9. 5 cm. track, and some of the specimens w^hich flew on board have been referred to Exocoetus spilopits. Between 40 and 50 species of this genus are known from tropical and sub-tropical waters. Very interesting are our captures of minute young flying-fish (see Chapter X.). The only fish belonging to the sub-order Percesoces from great depths is Chiasmodus niger (see Fig. 514, p. 721), taken by the "Michael Sars" in the Sargasso Sea. It was previously known from the eastern and west- ern sides of the Atlantic, and from the Indian Ocean. The fish has very powerful teeth, and can swallow a fish much larger than itself, the diges- tive tract being marvellously tensile (see Chapter X.). Lirus maculatus (see Fig. 464) and L. o
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