. Bulletin - New York State Museum. Science. Pig. 108 Caniarotoecliia acinus. A specimen in which the fold and sinus are not developed. En- lai'^ed X 4 Found in the crystalline upper Clinton limestone at Niagara. The species was originally described from the western Niagara. Genus rhynchonella Fischer de Waldheim [Ety.: puyxo?, beak] (1809. Notice dcs fos. goitv. Moscozv. p. 35; Hall & Clarke. 1893. Pal. N. Y. V. 8, pt 2, p. 177, 178) Subpyramidal plicated shells with a prominent anterior linguiform extension. Dental lamellae and a dorsal median septum occur, but no cardinal process; crura
. Bulletin - New York State Museum. Science. Pig. 108 Caniarotoecliia acinus. A specimen in which the fold and sinus are not developed. En- lai'^ed X 4 Found in the crystalline upper Clinton limestone at Niagara. The species was originally described from the western Niagara. Genus rhynchonella Fischer de Waldheim [Ety.: puyxo?, beak] (1809. Notice dcs fos. goitv. Moscozv. p. 35; Hall & Clarke. 1893. Pal. N. Y. V. 8, pt 2, p. 177, 178) Subpyramidal plicated shells with a prominent anterior linguiform extension. Dental lamellae and a dorsal median septum occur, but no cardinal process; crura are present, but other arm supports are wanting. Ehynchonella robusta Hall (Fig. 109). Atrypa robusta Hall . (1852. PaL N. Y. 2:71, pi. 23) Distinguishing characters. Large size; ro- bust character; brachial valve most convex; broad, ill defined fold and sinus; coarse Fig. 109 Rhynchonella robusta j-QUnded plicatiOHS. Found in the uppermost beds of the Clinton series at Niagara. Also east of Lockport (Hall). Ehynchonella (?) bidens Hall (Fig. no). Atrypa bidens Flail (1852, Pal. N. Y. 2:69, pi. 23) Distinguishing characters. Much smaller than preceding-; stronp- convexity of valves; deep sinus ^ &' fe : '1 Fig. 110 Rhynchonella with one plication; fold consisting of two rounded ^'^^"^^'^^ plications; rather broad, rounded lateral plicae; strongly emarginate front. Found in the lower Clinton beds 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; New York State Museum. Albany : New York State Education Dept
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