. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. H cardltformlH. Y., vol. 3, p. Y., vol. «, p. ol»lmiga, Hall, 1850, 277, Iajw. Held. Gr, obrtoura, Hall, 1859, PalT 277, Low. Htsld. Gr. occidualis, Walcott, 1885, Monogr. U. 8. Geo. 8ur., vol. 8, p. 173, Devonian. ovala. Hall, syn. for FlMthomytilus myti- limeris. owidfa, HaH, syn. for Plethomytihis my- tilimeris. rliomboidea, Hall, 185», Pal. N. Y., vol. 3, |). 275, Low. Held. (Jr. Hpinneri, Hall, 1
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. H cardltformlH. Y., vol. 3, p. Y., vol. «, p. ol»lmiga, Hall, 1850, 277, Iajw. Held. Gr, obrtoura, Hall, 1859, PalT 277, Low. Htsld. Gr. occidualis, Walcott, 1885, Monogr. U. 8. Geo. 8ur., vol. 8, p. 173, Devonian. ovala. Hall, syn. for FlMthomytilus myti- limeris. owidfa, HaH, syn. for Plethomytihis my- tilimeris. rliomboidea, Hall, 185», Pal. N. Y., vol. 3, |). 275, Low. Held. (Jr. Hpinneri, Hall, 1859, Pal. N. Y., vol. 3, p. 274, Low. Held. Gr. striata. Hall, 1860, Can. Nat. and Geo., vol. 5, p. 153, Up. Silurian. luhcardiformis, Hail, syn. for M. cardii- formis. suborbicularis. Hall, 1859, Pal. N. Y., vol. 3, p. 273, Low. Held. Gr. Megaptera, Meek & Worthen, 18()6. Tlie name was preoccupied. Microdm, Conrad, 1842, Jour. Acad. Nat. Sci., vol. 8, p. 247, This name was applied by Agassiz to a genus of fish in 1833, and was also preoccupied for a ^enus of insects. Hall proposed Eodon, in 1877, but Whitfield has shown tliat M. belli- ttriatm is a Cypricardella, and hence the latter name has priority. bellmtriatUH, see Cypricardella bellistriata. complanatus, see Cypricardella complanata. grfgarius, see Cypricardella gregana. reseiratus, see Cypricardella reservata. teiinislriatUB, see Cyricardella tenuistriata. MoDiELLA, Hall, 1884, Pal. N. Y., vol. 5, p. 4. (Plates and Ey^ planations.) [Ety. modus, a measure; ellm, diminutive.] Subrhomboidal, nar- rowed and auriciilate in front, broadly ex- panding posteriorly; two well-marked muscular impressions connected by a simple pallia! line; surface with radi- ating striae. Tppe M. py^maca. pygniuea, Conrad, 1842, (Pterinea pyg- msea,) Jour. Acad. Nat. Sci., vol. 8, p. 251, and Pal. N. Y., vol. 5, pi. 76, figs. 9-20, Ham. Gr. Modiola, Lamarck, 1801, Syst. An. sans Vert. [Eto. modiolus, a small measure or drink- ing vessel.
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