. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. FiQ. 130.—Acervularla davidsoni. davidsoni, Edwards & Haime, 1851, Pol. Fobs. d. Terr. Pal., p. 418, Up. Held, and Ham. Gr. inequaiis, Hall & Whitfield, 1x73, 2:id 1{(|, N. Y. St. Mus. Nat. Hist., p. 23:!, Ch. mung Gr. pentagona, Goldfuss, 1826, (Cyathopli\l !um j)entagonuni,) Petref. (lerm., p. cii. Devonian. profunda, Hall, 185H, Geo. Sur. Iowa, p., 477, Ham. Gr. M, Thomson <*!: Nicholson
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. FiQ. 130.—Acervularla davidsoni. davidsoni, Edwards & Haime, 1851, Pol. Fobs. d. Terr. Pal., p. 418, Up. Held, and Ham. Gr. inequaiis, Hall & Whitfield, 1x73, 2:id 1{(|, N. Y. St. Mus. Nat. Hist., p. 23:!, Ch. mung Gr. pentagona, Goldfuss, 1826, (Cyathopli\l !um j)entagonuni,) Petref. (lerm., p. cii. Devonian. profunda, Hall, 185H, Geo. Sur. Iowa, p., 477, Ham. Gr. M, Thomson <*!: Nicholson, 1870, Ann. and Mag. Nat. Hist. 4th sir, vol. 17, p. 455. [Ktv. itlcron, Huniiuit; phylhii, leaf.] Coralliim isimple, !ni- binate, or suu-cylindrical, straight, nr curved; septa numerous, well-dcvd- oped, coalescing, and curving as tin y reach the tiibulte, forming promi- nent, tortuous ridges on the cen- ii' tral, elevated p<u- p^ tion, and becom- B,'Ji^ ing complicated "''. with the tabulse to form the con- spicuous, central prominence, which often forms a central axis; fossette reaches from tiie base of the elevation to the margin of the calyx; exterior usually constrict- ed. daense. oneidaense, Billings, 18,-)!), (Clisiophyl- lum oneidaense, Can. Jour, p. 128, Uji Held. iir. agaricia, Lamarck, IHOl, Syst. des Anim. sans Vert. Not Palojozoic. swinderniana, see Theoia swinderniana. Alveolites, Lamarck, ,Sy8t. den Anim. sans Vert., p. 375, [Ety. a/i'«w«, cavity; lUlios, stone.) Dendroid, massive, or in- crusting; corallites short, prismatic, or cylindrical; walls united ; tabul* com- plete ; mural pores large, usually mar the angles of the tubes, few in number; calices oblique, lower lip most promi- nent; septa absent, or forming tooth- like projections. Type A. escliaro- ides. arctica. Woodward, 1879, Lond. Geo. Mug. n. 8., vol 5, Devonian. billingsi, Nicholson, 1874, Geo. Mag. n. .s., vol. 1, p. 55, Up. Held. Gr. confertus, Nicholson, 1874, G
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