. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fio. 450.—Am- ple X o p I' a robuHtu fun- nel-Nil aped aiaplirng n., Hupposed to be a niodifleii cysMphragni. KiG 44».—Amplexopora cingulatii. Tangential Mectlon X 50, showing wall structure, and verti- cal section X fiO. (liBcoidea, Nicholaon, 1875, (ChetefcH discoideuB,) Ohio Pal., vol. 2, p. 206, Hud. Riv. Gr. pustulosa, Ulrich, (in press,) Geo. 8ur. 111., vol. 8, pi. 3fi, Hud. Riv. Gr. robusia, Ulrich, 1883, J
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fio. 450.—Am- ple X o p I' a robuHtu fun- nel-Nil aped aiaplirng n., Hupposed to be a niodifleii cysMphragni. KiG 44».—Amplexopora cingulatii. Tangential Mectlon X 50, showing wall structure, and verti- cal section X fiO. (liBcoidea, Nicholaon, 1875, (ChetefcH discoideuB,) Ohio Pal., vol. 2, p. 206, Hud. Riv. Gr. pustulosa, Ulrich, (in press,) Geo. 8ur. 111., vol. 8, pi. 3fi, Hud. Riv. Gr. robusia, Ulrich, 1883, Jour. Cin. Soc. Nat. Hist., vol. 6, p. 82. Hud. Riv. Gr. septosa, Ulrich, 1879, (Atac- topora septosa,) Jour. Cin. Soc. Nat. Hist., vol. 2, p. 125, Hud. Riv. Gr. superba, Foord, 1883, Cont. to Micropaloeon- tology, p. 16, Tren- ton Gr. winchelli, Ulrich, 1886, 14th Rep. Geo. Sur. Minn., p. 91, Trenton Gr. Anisotkvpa, Ulrich, 1883, Jour. Cin. Soc. Nat. Hist., vol. 6, p. 275. [Ety. anjsos, unequal; irwpa^ perforation.] Ramose, hollow, inner side lined with an epi- theca; walls oi tubes thin in the in- terior, and thickened exteriorly; no interstitial cells or spiniform tubuli. Type A. symmetrica, fistulosa, Ulrich, (in press,) Geo. Sur. 111., vol. 8, pi. 72, St. Louis Gr. ramulosa, Ulrich, (in press,) Geo. Sur. 111., vol. 8, pi. 72, St. Louis Gr. solida, Ulrich, (in press,) Geo. Sur. 111., vol. 8, pi. 72, Kaskaskia Gr. symmetrica, Ulrich, 1883, Jour. Cin. Soc. Nat. Hist., vol. 6, p. 76, Kaskas- kia Gr. Archimedes, LeSueur, 1842, (Retepora ar- chimedes,) Am. Jour. Sci., vol. 43, p. 19. [Ety. froni its resemblance to the machine for raising water, consisting of a tube rolled in a spiral form around a cylinder, invented by Archimedes. Distinguished from Fenestella by its axis and mode of growth; the flabel- liform expansion acq^uiring a solid cen- tral axis, around which it re"olves in an ascending spiral form, spreading equally in all directions. Type A. comm
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
