. Annual report of the Regents. New York State Museum; Science. 2GO NEW YORK STATE MUSEUM ones on either side; linear interspaces; sharply defined fold of brachial valve, with plications almost obsolete. Found only in the Manlius limestone of North Buffalo and Will- iamsville. Not common. Spirifer (Delthyris) sulcatus Hall (Fig. 120) (1852. Pal. N. Y. 2:261, pi. 54) Distinguishing characters. Near- ly equal valves; deep sinus; four or more plications on either side, with wide inter- spaces; fine radiating striae crossing plications and inter- Pig. 120 spirifer (Deithyris) suicatus with
. Annual report of the Regents. New York State Museum; Science. 2GO NEW YORK STATE MUSEUM ones on either side; linear interspaces; sharply defined fold of brachial valve, with plications almost obsolete. Found only in the Manlius limestone of North Buffalo and Will- iamsville. Not common. Spirifer (Delthyris) sulcatus Hall (Fig. 120) (1852. Pal. N. Y. 2:261, pi. 54) Distinguishing characters. Near- ly equal valves; deep sinus; four or more plications on either side, with wide inter- spaces; fine radiating striae crossing plications and inter- Pig. 120 spirifer (Deithyris) suicatus with striae spaces; very coarse, lamellose, enlarged subcqually spaccd concentric growth lines which interrupt the radiating striae. Found rarely in the Clinton lenses and the lower Rochester shale; more common in the Bryozoa beds at Niagara. Also at Lockport and elsewhere (Hall). Genus homoeospira Hall & Clarke [Ety.: 6/j.()t(>?, like; ff-eipa, spire] (1893. Pal. N. Y. V. 8, pt 2, p. 112) Shell rostrate, radially plicate, and with a short curved hinge line; apex truncated by a circular pedicle opening. Spirals spiriferoid, with from six to nine volutions and a V-shaped jugum. A linear cardinal process separates the crural plates. Homoeospira apriniformis Hall (Fig. 121). Atrypa aprinis Hall (1852. Pal. N. Y. 2:200, pi. 57) Fig. 121 Homoeospiraapriai- Distiiiguishing characters. Small, roundish, oval, scarcely longer than wide; nearly equally convex valves; non- sinuate front, numerous simple rounded plications; fine concentric striae. Found in the Rochester shale at Lockport (Hall). Probably also at 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; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
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Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience
