. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Rlll.âSCA.] MOLLUSCOIDA. H21 Kio. ")09.âRhii)oi)ora frondosii. Riiii'OPoRA, Hall, 1852, Pal. N. Y., vol. j, p. 48. [Ety. rhine, file ; jporos, pore.] Ex- panded or subcylindncal and hollow; oelluliferous on two sides; cells arranged in quincunx order, roundish or oval, and raised in little pustules over the surface. Type R. verrucosa, cnrvata, Ringueberg, 188(3, Bull. Buf. Soc. Nat, Sci., vol. f), p. 19, N
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Rlll.âSCA.] MOLLUSCOIDA. H21 Kio. ")09.âRhii)oi)ora frondosii. Riiii'OPoRA, Hall, 1852, Pal. N. Y., vol. j, p. 48. [Ety. rhine, file ; jporos, pore.] Ex- panded or subcylindncal and hollow; oelluliferous on two sides; cells arranged in quincunx order, roundish or oval, and raised in little pustules over the surface. Type R. verrucosa, cnrvata, Ringueberg, 188(3, Bull. Buf. Soc. Nat, Sci., vol. f), p. 19, Niagara Gr. frondosa. Hall & Whitfield, 1875, Ohio Pal., vol. 2, p. 112, Niagara Gr. ,.^"-"V- ,^ ^ tuberculosa, f^ llw^*i^A Hall, 1852, Pal. \J\ m SmI^ ^- Y., vol. 2, 'iN'^ "»â &;#^ P- 170, Niagara r-Sfc-aKa^V^ tubulosa, Hall, ' ' ' 1852, Pal. , vol. 2, p. 49, Clinton Gr. venosa, Spencer, 1884, Bull. No. 1, Mus. Univ. St. Mo., p. 54, Clinton Gr. verrucosa, Hall, 1852, Pal. N. Â¥., , p. 48, Clinton Gr. RiioMBOPORA, Meek, 1872, Pal. Eastern Nebraska, p. 141. [, rhomb; poros, pore.] Ramose, tubular, cells short; septa none; corallites radi- ating obliquely outward and upward on all sides from an imaginary axis; mouths rhombic or rhombic oval, and arrang<'d in longitudinal and oblique spiral rows; interspaces thick, with minute pores visible in micro- scopic sections. Type R. lepidoden- droidea. armata, Ulrich, 1884, Jour. Cin. Soc. Nat. Hist., vol. 7, p. 31, Kaskaskia Gr. (?) asperrima, Ulrich, (in press,) Geo. Sur. 111., vol. 8, pi. 70, Keokuk Gr. attenuata, Ulrich, (in press,) Geo. Sur. 111., vol, 8, pi. 70, Keokuk or War- saw Gr. amfluens, see Acanthoclema continens. (Tassa, Ulrich, 1884, Jour. Cin. Soc. Nat. Hist., vol. 7, p. 25, Up. Coal Meas. (lecipiens, Ulrich, (in press,) Geo. Sur. 111., vol. 8, pi. 71, St. Louis Gr. (lichotoma, Ulrich, (in press,) (Jeo. Sur. 111., vol. 8, pi. 70, Burlington Gr. elegantula, tflri
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