. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 846.—Matherlii tener. ovatus. Hall, 1870, Prelim. Notice Lam. Shells, p. 15, and Pal. N. Y., vol. 5, p. 351, Waverly Gr. parvus. White & Whitfield, 1862, Proc. Bost. Soc. Nat. Hist., vol. 8, p. 299, Kinderhook Gr. sangamonensis, Worthen, (in press,) Geo. Sur. 111., vol. s, p. 123 Coal Meas. shnbenacadiensis, Hartt, 1868, Acad. Geo. p. 302, Carb. tenuistriatus, Meek & Worthen, 1867, Proc. Chi. Acad. Sc
![. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 846.—Matherlii tener. ovatus. Hall, 1870, Prelim. Notice Lam. Shells, p. 15, and Pal. N. Y., vol. 5, p. 351, Waverly Gr. parvus. White & Whitfield, 1862, Proc. Bost. Soc. Nat. Hist., vol. 8, p. 299, Kinderhook Gr. sangamonensis, Worthen, (in press,) Geo. Sur. 111., vol. s, p. 123 Coal Meas. shnbenacadiensis, Hartt, 1868, Acad. Geo. p. 302, Carb. tenuistriatus, Meek & Worthen, 1867, Proc. Chi. Acad. Sc Stock Photo](https://c8.alamy.com/comp/RJ12R3/north-american-geology-and-palaeontology-for-the-use-of-amateurs-students-and-scientists-microform-paleontology-paleontology-geology-palontologie-palontologie-gologie-fig-846matherlii-tener-ovatus-hall-1870-prelim-notice-lam-shells-p-15-and-pal-n-y-vol-5-p-351-waverly-gr-parvus-white-amp-whitfield-1862-proc-bost-soc-nat-hist-vol-8-p-299-kinderhook-gr-sangamonensis-worthen-in-press-geo-sur-111-vol-s-p-123-coal-meas-shnbenacadiensis-hartt-1868-acad-geo-p-302-carb-tenuistriatus-meek-amp-worthen-1867-proc-chi-acad-sc-RJ12R3.jpg)
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. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 846.—Matherlii tener. ovatus. Hall, 1870, Prelim. Notice Lam. Shells, p. 15, and Pal. N. Y., vol. 5, p. 351, Waverly Gr. parvus. White & Whitfield, 1862, Proc. Bost. Soc. Nat. Hist., vol. 8, p. 299, Kinderhook Gr. sangamonensis, Worthen, (in press, ) Geo. Sur. 111., vol. s, p. 123 Coal Meas. shnbenacadiensis, Hartt, 1868, Acad. Geo. p. 302, Carb. tenuistriatus, Meek & Worthen, 1867, Proc. Chi. Acad. Sci., vol. 1, p. 17, Up. Coal Meas. truncatus, Walcott, 1885, Monogr. U. S. Geo. Sur., vol.8, p. 243, Carboniferous. Matheria, Billings, 1858, Can. Nat. and Geo., vol. 3, p. 440. [Ety. proper name.] Eguivalve, inequilateral; beaka anterior; two small, obtuse, cardinal teeth in the left valve, and one in the right; no lateral teeth; two muscular impressions; ligament ex- ternal. Type M. tener. tener, Billings, 1858, Can. Nat. and Geo., vol. 3, p. 440, Trenton Gr. Megalomus, Hall, 1852, Pal. N. Y., vol. 2, p. 343. [Ety. megas. great; omos, shoulder.] Large, equivalve, concen- trically lined, longitudinal; umbones anterior incurved; shell thick and along the hinge-line thickened on the interior; muwular impression large and deep, with two small circular pits above. Type M. canadensis. canadensis. Hall, 1852, Pal. N. Y., vol. 2, p. 343, Guelph Gr. compresaus, Nicholson & Hinde, 1874, Can. Jour., vol. 14, p. 159, Niagara Gr. Mkgambonia, Hall, 1859, Pal. N. Y., vol. 3, K. 273. [Ety. megas, great; ambon, the OSS of a shield.] Equivalve, inequi- lateral, subovoid, gibbous in the middle and toward the umbones; anterior side r^HPlf ge^^Jost [mat. MUt; lobed or^^Hiriate; muscular iiniiroH- sion large^^)OBterior cardinal inn^'in expanded or alate; hinge-liae cmiiii- late<l anteriorly; teeth numeroiiH-. sur- face concentrically lined, andNomtiinicH with radiating striae. Type M. Hu