. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 401. -Porocrinus Diagram. itssbUS, Meek & Wortben. , Proc. Acad. Nat. 8ci. Phil., p. 115, anH Geo. Sur. 111., \nl. 3, p. 330, Hud. Kiv. Gr. penfaeonus. Meek & Wortben, 1865, Proc. Acrtd. Nat. Sci. Phil., p. 146, and Geo. Sur. III., vol. 3, p. 332, Trenton Gr. smithi, Grant, 1881, Trans. Ot- —Poiocrinuscras- tawa Field Nat- '*"•''• One basal and two uralists' Club, «"br
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 401. -Porocrinus Diagram. itssbUS, Meek & Wortben. , Proc. Acad. Nat. 8ci. Phil., p. 115, anH Geo. Sur. 111., \nl. 3, p. 330, Hud. Kiv. Gr. penfaeonus. Meek & Wortben, 1865, Proc. Acrtd. Nat. Sci. Phil., p. 146, and Geo. Sur. III., vol. 3, p. 332, Trenton Gr. smithi, Grant, 1881, Trans. Ot- —Poiocrinuscras- tawa Field Nat- '*"•''• One basal and two uralists' Club, «"bradlals enlarged. No. 2, p. 42, Trenton Gr. PoTERir-CBiNUS, MiUtT, 1821, Nat. Hist. Cri- noidea, p. [Ety. poterion, goblet; An'non, lily.] Calyx obconical; basals5; sub-radials 5; radia's 1x5, with a varia- ble number of smaller ones, the azygoiis ray often havine more than the others; azygouR plates 3 or 4, within the calyx, succeeded by smaller ones that form part of the ventral sac; vault produced m a long sac or proboscis; arms simple or branching and bearing pinnules. Type P. c-assus. iiqualis, Hall, 1860. Supp. to Geo. Sur. Iowa, p. 63, Burlington Gr. nUeniatus, see Dendrocrinus alternatus. anomalos, , 1880, Jour. Cin. Soc. Nat. Hist., vol. 3, p. 158, Kaskas- kia Gr. arachniformis, Worthen, 1882, Bull. No. 1, 111. St. Mus. Nat. Hist., p. 13, and Geo. Sur. 111., vol. 7, p. 281, Keo- kuk Gr. asper, Worthen, 1882, Bull. No. 1, III. St. ISIus. Nat. Hist., p. 11, and (ii'o. Sur. III., vol. 7, p. 27'< Kfokuk Gr. asperatus, Worthen, 1882, Bull. No 1, 111. St. Mus. Nat. Hist., p. 12, and Geo. Sur. 111., vol. 7, p. 280, Keokuk Gr. barrisi, see Cyathoi-riiins bairisi. bayensiif, see Scaphiocrinus bayensis. bisselli, Worthen, 1873, Geo. Sur. 111., vol. 5, p. 546, KaakasKia Gr. Irriareits, see Sciipliiocrinns briareiis. buffaloensis, Worthen, (in jjresp,) Geo. Sur. 11)., vol. 8, p. 89, Ham. Gr. burketi, see Scaphiocrinus buiketi. bursiformis, White, 1862, Pr
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