. Annual report. New York State Museum; Science; Science. 164 NEW YORK STATE MUSEUM attachment between Platyceras and the crinoids. With the opening of the Devonic the development of Platyceras became enormous, so much so that the calcareous phase of the earliest Devonic has been termed the Platyceras stage. The crinoids alsc were common at this time, but cases of any dependent conjunction of the two are extraordinarily rare; the only instance of this earl}; date known to me is that cited by Drevermann from the Cob- lentzian. Little by little, however, the habit was assumed and becoming more f
. Annual report. New York State Museum; Science; Science. 164 NEW YORK STATE MUSEUM attachment between Platyceras and the crinoids. With the opening of the Devonic the development of Platyceras became enormous, so much so that the calcareous phase of the earliest Devonic has been termed the Platyceras stage. The crinoids alsc were common at this time, but cases of any dependent conjunction of the two are extraordinarily rare; the only instance of this earl}; date known to me is that cited by Drevermann from the Cob- lentzian. Little by little, however, the habit was assumed and becoming more frequent in the Middle Devonic it seems to have attained a culmination in the faunas of the earlier Carbonic. During all the ages which have intervened between the. 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 New York State Museum. Albany : University of the State of New York
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