. 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. INVERTEBRATE BOTTOM FAUNA 465 sea-urchin (Echinus esculentus), the hermit crab (Pagurus bernhardus), and a few other forms. Their occurrence is, however, really due to their being surprised by the receding of the tide, and they are not, strictly speaking, adapted to a life in this area. There are some forms characteristic of the low-tide area. Fig. 323. Metridium dianthus, Ell. (After Andres.) wh
. 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. INVERTEBRATE BOTTOM FAUNA 465 sea-urchin (Echinus esculentus), the hermit crab (Pagurus bernhardus), and a few other forms. Their occurrence is, however, really due to their being surprised by the receding of the tide, and they are not, strictly speaking, adapted to a life in this area. There are some forms characteristic of the low-tide area. Fig. 323. Metridium dianthus, Ell. (After Andres.) which cannot be regarded as belonging solely to any particular facies. Perhaps the commonest are the sandhoppers (Gam- marids), which have a wonderful knack of hiding themselves quickly in holes and cracks, when the stone or other object, under which hundreds may be sheltering, is removed. One of the most abundant is Orchestia littorea, which, although a true marine form, is able to exist for a long" time out of the water, I have found quantities of them during summer living 2 H. 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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