This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 Excerpt: ...3, lll. St. Mus. Nat. Hist., p. 72, )riskany Gr. Euteletes. Fischer de Waldheim, 1830, Oryctographi du Gouv. de Moscou, p. 144. Not defined so as to be recognized by any one, and, without any proper excuse, Waagen has proposed to supplant Syntriclasma with it. He might have used any other catalogue name, and he would ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 Excerpt: ...3, lll. St. Mus. Nat. Hist., p. 72, )riskany Gr. Euteletes. Fischer de Waldheim, 1830, Oryctographi du Gouv. de Moscou, p. 144. Not defined so as to be recognized by any one, and, without any proper excuse, Waagen has proposed to supplant Syntriclasma with it. He might have used any other catalogue name, and he would have had his followers. Hai.lina. Winchell and Schuchert, 1895, Geo. Sur. Minn., vol. 3, p. 471. (It first appeared by name without proper definition in 1892, in Am. Geol., vol. 9, p. 291.) Ety. proper name. Shells small, articulate, rostrate, biconvex, and semiplicate. Pedicle opening usually, bounded laterally by incomplete deltidial plates. Calcified brachial supports longer than half the length of the dorsal valve. Crural plates of the dorsal valve probably coalesce. Shell structure fibrous, impunctate. Type //. mffordi. nicolletti, Winchell and Schuchert. Syn. for Atrypa exigua. saffordi, Winchell and Schuchert, 1895, Geo. Sur. Minn., vol. 3. p. 473. Birdseye limestone. Hipparionyx, Vanuxem, 1842, Geo. of N. Y. Rep. 3d Dist., p. 29. Ety. hippos, horse; onyx, nail, hoof. Shell large, subhemispherical. Pedicle valve slightly convex or concave; hingeline short, straight; cardinal area low; beak retrorse; delthyrium broad, and covered by an imperforate convex deltidium; teeth large, and supported by lamellre which extend to the bottom of the umbonal cavity, and are produced into strong ridges that surround a large muscular area composed of broad, flabellate diductors, inclosing an elongate or cordate adductor impression. Slight median septum in both valves. No cardinal area in brachial valve. General appearance externally like Streptochynchus, to which genus it has sometimes been referred. Type H. proximus. proximus, Vanuxem, 1842, Geo. N. Y. ...
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