. The depths of the sea. An account of the general results of the dredging cruises of SS. Porcupine and Lightning during the summers of 1868, 1869 and 1870, under the scientific direction of Dr. Carpenter, , J. Gwyn Jeffreys, , and Dr. Wyville Thomson, Lightning (Ship); Ocean; Marine animals; Deep-sea temperature; Deep-sea desposits; Porcupine (Ship). CHAP. X.] CONTINUITY OF THE CHALK. 483 and he referred the group to the Polyzoa. When Mr. Toulmin Smith studied the Ventriculites, the Hexactinellidse — the sponges with six-rayed meshes or spicules—were practically unknow
. The depths of the sea. An account of the general results of the dredging cruises of SS. Porcupine and Lightning during the summers of 1868, 1869 and 1870, under the scientific direction of Dr. Carpenter, , J. Gwyn Jeffreys, , and Dr. Wyville Thomson, Lightning (Ship); Ocean; Marine animals; Deep-sea temperature; Deep-sea desposits; Porcupine (Ship). CHAP. X.] CONTINUITY OF THE CHALK. 483 and he referred the group to the Polyzoa. When Mr. Toulmin Smith studied the Ventriculites, the Hexactinellidse — the sponges with six-rayed meshes or spicules—were practically unknown, though there. Fig. SO.—Ventriculites simpler, Toulmin Smith. Once and a half the natural size. were already a few examples in museums. One of the first results of deep-sea dredging was the discovery that the chalk-mud of the deep sea is in many places literally crowded with these ; and when we compare i i 2. 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 Thomson, C. Wyville (Charles Wyville), Sir, 1830-1882; Carpenter, William Benjamin, 1813-1885; Jeffreys, John Gwyn, 1809-1885. London ; New York : Macmillan and co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmar, booksubjectocean
