. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fio. listeci. carho, coal; Area, a genua.] Inequi- valve, inequilateral, very convex, trans- versely oolong or oval; umbones gib- bous, prominent, strongly incurved, with subangular posterior slopes; valves closed all around with smooth margins; ligament external; cardinal margin arched; two anterior oblique teeth, and behind these minute crenu- lations, as in Area. Type C. gibbosa. (jibbosa, Meek &a
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fio. listeci. carho, coal; Area, a genua.] Inequi- valve, inequilateral, very convex, trans- versely oolong or oval; umbones gib- bous, prominent, strongly incurved, with subangular posterior slopes; valves closed all around with smooth margins; ligament external; cardinal margin arched; two anterior oblique teeth, and behind these minute crenu- lations, as in Area. Type C. gibbosa. (jibbosa, Meek & "Worthen, 1870, Proc. Acad. Nat. Sci. Phil., p. 40, and Geo. Siir, 111., vol. 6, p. 531, Coal Mesa. Cardinia, Agassiz, 1838, in Societ. Basil. [Ety. cardo, the hinge of a door.] Oblong, attenuated poste- riorly, com- pressed; ligament external; cardinal teeth obscure, lateral, remote, promi- nent; adductor impressions deep; pal- lial line simple. Type C. listeri. xquimarginalis, see Edmordia ajquimar- Kinalis. antigonesensis, Dawson, 18(^8, Acad. Geo., p. 304, Carb. complanata, Winchell, 1862, Proc. Acad. Xat. Sci., p. 413, Portage Gr. foHcentrica, see Sanguiuolites concentricus. conlata, Swallow, 1858, Trans. St. Louis Acad, Sci., vol. i, p. 191, Permian Gr. (?) fragilis. Cox, 1857, Geo. Sur. Ky., vol, 15, p. 670, Coal Meas. 0(!cidentali8, Swallow, 1860, Trans. St. Louis Acad. Sci., p. 655, Waverly or Choteau Gr. fiubangulata. Swallow, 1858, Trans. St. Louis Acad. Sci., vol. 1, p. 192, Per- mian Gr. tubangulata, Dawson, 1868, Acad. Geol., p. 304. This name wasj>reoccupied. C A KDiOLA, Broderip, 1844, Trans. Geo. Soc. [Ety. kardia, the heart.] Oblique- ly oval or sub- circular, tumid, equivalve, in- eq uilriteral; beaks large, Fiq. in- prominent, temipta, obliqnelv incurved anteriorly; ends Bubequal, rounded; ventral margin convex; hinge-line shorter than the shell, with a flattened cardinal area, widest between the beaks, extending its whole length
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
