. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. âi'cnlanierellft Hide vli'w. )orsal view. Mu8. Nat. Hist., p. 90, micula, Hall, 1H()7, I'al. 378, Ham. (Jr. obsoleaceuH, Hall, »i7, Pal. N. Y., vol. 4, p. 371t, Devonian. papilionensis. Hall, 1858, (Pentainerus papilionensis,) Geo, Rep. Iowa, vol. I, pt. 2, p. ")14, Ham. <ir. Fkstamkrun, Sowerby, 1812, Min. Conch., vol. I, p. 7;i. [Kty. jieiilti, fivt^; inrnix, aparUnents.] Shell glob-^ae, ovate, re
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. âi'cnlanierellft Hide vli'w. )orsal view. Mu8. Nat. Hist., p. 90, micula, Hall, 1H()7, I'al. 378, Ham. (Jr. obsoleaceuH, Hall, »i7, Pal. N. Y., vol. 4, p. 371t, Devonian. papilionensis. Hall, 1858, (Pentainerus papilionensis,) Geo, Rep. Iowa, vol. I, pt. 2, p. ")14, Ham. <ir. Fkstamkrun, Sowerby, 1812, Min. Conch., vol. I, p. 7;i. [Kty. jieiilti, fivt^; inrnix, aparUnents.] Shell glob-^ae, ovate, re- â¢ejving valve largest; generally d- 'â - lute ot mesial fold and sinus, 'ui winn present, the fold is in ihf â¢â¢^^ and the sinus in the ent* r .it', ai. ; no hinge-line; area large, ^pflnH', and having a deep, triangi'Lir ,'â¢â [ in 'h\ center, under tin* be k I d,. do)~ I valve, and into which lin: ucali. Im entering valve is strongly incurved; internally the receiving valve has one large bipartite central septum, the walls of which suddenly divaricate as they ap- proach the ent» ring valve, forming the walls of the external triangular open- intr, and between them a triangular chaMib^-r much smaller than the two lateral ones; in the entering valve the two corresponding plates are subparallel, and separate from their origin, being so curved that internal casta show one of their edges, like the diverging cardinal teeth of Orthis, and the inner edges form the long, subparal- lel slits, the middle one of the three re- sulting chambers being much the nar- rower. Type P. knighti. New I'al. Not recog- of I'logr., P- inntuH, see Pcntatnerella arata iimtottiiii, Mc('heHney, I8<n, Fobs., p. H7, Niagara :!!, and Pal. N. Y., vol. 2, p. 278. Niag- ara (ir. chicagociiHiK, VVinclicil i*ic .Maicy, ls«i'), Mem. MoHt. Soc. Nat. Mist., p. 04, Niag- ara (ir. comis, Owen, I8,")2, (Atrvpa comls,) (ifo. Sur. Wis., Iowa anil Minn., p. 58;8
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
