Archive image from page 606 of The depths of the ocean. 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 depthsofoceangen00murr Year: 1912 PELAGIC ANIMAL LIFE 571 (boreal), viz. Aglantha digitalis (see Fig. 399), which sometimes plays an important part in the pelagic life of the Norwegian Sea ; in the North Sea Hensen fell in with a shoal of these medusae which he estimated at 237 billions of individuals. As mentioned by Haeckel, it is character- istic of thi
Archive image from page 606 of The depths of the ocean. 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 depthsofoceangen00murr Year: 1912 PELAGIC ANIMAL LIFE 571 (boreal), viz. Aglantha digitalis (see Fig. 399), which sometimes plays an important part in the pelagic life of the Norwegian Sea ; in the North Sea Hensen fell in with a shoal of these medusae which he estimated at 237 billions of individuals. As mentioned by Haeckel, it is character- istic of this form that it suddenly appears in enormous quantities for some days and then suddenly disappears for some months. As rare visitors in the north may be mentioned, Pantachogon haeckelii, Pectyllis arctica, and Crossota norvegica} Other species are strictly limited to the warm zone of the ocean, which may be said to f. _.,..._
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Keywords: 1900, 1910, 1912, _michael_sars_north_atlantic_deep_sea_expedition_191, appell_f_jakob_johan_adolf_1857_, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, drawing, gran_h_h_haakon_hasberg_1870_, helland_hansen_bj_rn_1877_, historical, history, illustration, image, london_macmillan, murray_john_sir_1841_1914, north_atlantic_ocean, oceanography, page, picture, print, reference, vintage
