. 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. 582 DEPTHS OF THE OCEAN chap. took this genus in deep known from the Pacific.^ The " Michael Sars water at several stations in the North Atlantic, The Cirripedia are the only group of crustaceans which in the adult stage abandon the pelagic life of youth and become sessile, fixing them- selves to the b
. 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. 582 DEPTHS OF THE OCEAN chap. took this genus in deep known from the Pacific.^ The " Michael Sars water at several stations in the North Atlantic, The Cirripedia are the only group of crustaceans which in the adult stage abandon the pelagic life of youth and become sessile, fixing them- selves to the bottom like many other invertebrates. Some are fixed to the rocks of the littoral region (the balani), or to pumice stones and nodules from the great depths of the ocean, while others are attached to whales and turtles, or (like the Lepadidae) to floating objects carried along by currents. One species {Lepas fascicidaris) forms considerable floating clusters composed of several individuals. A peculiar group (for example, Sacculina from the tail of decapod Crustacea) is entirely parasitic and transformed to such a degree that the crusta- ceous nature of the animal is hardly recognisable. The Cirripedia from the Atlantic cruise of the " Michael Sars" have been examined by P. P. C. Hoek, who found the following species of the genus Lepas :— Lepas anatifera (see Chapter III., p. loo, Fig. 87), taken at Station 61 (on a floating log), and off St. John's. Lepas anserifera, Station 67 (on Sargasso weed), Station 69 (on a small log). Lepas pectinata^ Stations 10, 25, 31, 69, 86, 91 and 92 (fixed to birds' feathers, cork, fucus, pumice- stone, and to L. fascicularis). Lepas hii/i, Station 56 (on a turtle). Lepas fascicularis, Stations 25, 91, 92. All these species are known from other oceans, especially the Pacific, and are principally warm-water forms. Of other Cirripedia the following species were captured :— Fcvcilasma carinatmn, Station 53 (on the bottom). Conchoderma v
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
