. Animals before man in North America; their lives and times. Paleontology. The Era of Itwertehi'ate^ most important agents in the formation of tlie great beds of limestone in which their fossil re- mains are preserved. There are few species of crinoids now living, and these are mostly con- fined to limited areas of very deep water and to be obtained only by means of special appliances for dredging in the deep sea. So for a long time even the most common of them {Pentacrinus caput- mediisce) was very rare and regarded as one of the great treasures of such mu- seums as chanced to pos- sess a sp
. Animals before man in North America; their lives and times. Paleontology. The Era of Itwertehi'ate^ most important agents in the formation of tlie great beds of limestone in which their fossil re- mains are preserved. There are few species of crinoids now living, and these are mostly con- fined to limited areas of very deep water and to be obtained only by means of special appliances for dredging in the deep sea. So for a long time even the most common of them {Pentacrinus caput- mediisce) was very rare and regarded as one of the great treasures of such mu- seums as chanced to pos- sess a specimen. The re- searches of the United States Fish Commission steamer Albatross, how- ever, brought to light a locality in the Gulf of Mexico whence many examples of this beautiful radiate have been obtained, and other species have been discov- ered by the Albatross and by the English Challenger. Still, the group of crinoids is but 79. modern crinoid, Penta- crinus caput - medusce. Much 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 Lucas, Frederic A. (Frederic Augustus), 1852-1929. New York, D. Appleton and company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1902
