. The Devonian crinoids of the State of New York. Crinoidea, Fossil; Paleontology; Paleontology. DEVONIAN CRINOIDS OF NEW YORK 75 Biserial arms. Arms in which the brachials are arranged in two alternating rows with the smaller ends of the plates meeting midway. Pinnulars. Ossicles composing the pinnules, jointed appendages of the arms. Columnals. Ossicles composing the column or stem. Nodals. The larger columnals and all cirrus-bearing columnals. Internodals. The smaller columnals between the nodals. Proximale. The proximal columnal which in some forms remains fixed to the calyx and may be fus
. The Devonian crinoids of the State of New York. Crinoidea, Fossil; Paleontology; Paleontology. DEVONIAN CRINOIDS OF NEW YORK 75 Biserial arms. Arms in which the brachials are arranged in two alternating rows with the smaller ends of the plates meeting midway. Pinnulars. Ossicles composing the pinnules, jointed appendages of the arms. Columnals. Ossicles composing the column or stem. Nodals. The larger columnals and all cirrus-bearing columnals. Internodals. The smaller columnals between the nodals. Proximale. The proximal columnal which in some forms remains fixed to the calyx and may be fused with the *»tft Figure Diagrammatic analyses of a dorsal cup showing orientation and giving nomenclature; ant. R, anterior radius; r. ant. IR, right anterior interradius; r. ant. R, right anterolateral radius; r. post. IR, right posterolateral interradius; r. post. R, right posterior radius; post. IR, posterior interradius; /. post. R, left posterior radius; /. post. IR, left posterolateral interradius; /. ant. R, left anterolateral radius; /. ant. IR, left anterior interradius. Cirrals. The ossicles composing the cirri, jointed appendages of the column. Syzygy. An immovable sutural union between two brachials of a pinnulate arm. The lower brachial bears no pinnule and is termed the hypozygal; the upper, pinnule-bearing one is the epizygal. The term syzygy is also applied to a similar union between a cirrus-bearing nodal and the next lower 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 Goldring, Winifred, 1888-1971. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaleont, bookyear1923
