. A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880. Blake (Steamer); Marine animals -- Atlantic Ocean; Marine sediments. CHARACTERISTIC DEEP-SEA TYPES. -- 1IOLOT1IURIANS. 85 Owing to the absence of fossil holothurians we are unable, as in the case of other echinoderms, to trace the groups from which this peculiar deep-sea order of Elasipoda has been derived. While during earlier geological periods th
. A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880. Blake (Steamer); Marine animals -- Atlantic Ocean; Marine sediments. CHARACTERISTIC DEEP-SEA TYPES. -- 1IOLOT1IURIANS. 85 Owing to the absence of fossil holothurians we are unable, as in the case of other echinoderms, to trace the groups from which this peculiar deep-sea order of Elasipoda has been derived. While during earlier geological periods the holothurians un- doubtedly made their way by gradual migration from the shore into deep water, their shallow-water progenitors have left us no. Fig. 338. — Psolus tuLerciilosus. f. (Th<5el.) trace of their existence. The whole tribe of Elasipoda, which stands out apparently isolated from the other orders of holo-. 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 Agassiz, Alexander, 1835-1910; U. S. Coast and Geodetic Survey. Boston ; New York : Houghton, Mifflin and Co.
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Keywords: ., bookauthoruscoasta, bookcentury1800, bookdecade1880, bookyear1888
