. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. [SCA SCH.—SIP.] ECHINODERMA TA. 281 tethys, Meek & Worthen, 1869, Proc. Acad. Nat. Sci. Phil, p. 143, and Geo. >Sur. 111., vol. 5, p. 419, Burling- ton Gr. torhioitM, see Grapliiocrinus tortuosus. unicus. Hall, 1861, Desc. New Crin., p. 8, and Geo. Stir. 111., vol. 5, p. 49;i, Keo- kuk Gr. varsoviensis, Worthen, 1882, (Poterio- crinuH varsoviensis,) Bull. No. 1, III. Ht. Mus. Nat. Hist, p. 20, and Geo. Sur.
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. [SCA SCH.—SIP.] ECHINODERMA TA. 281 tethys, Meek & Worthen, 1869, Proc. Acad. Nat. Sci. Phil, p. 143, and Geo. >Sur. 111., vol. 5, p. 419, Burling- ton Gr. torhioitM, see Grapliiocrinus tortuosus. unicus. Hall, 1861, Desc. New Crin., p. 8, and Geo. Stir. 111., vol. 5, p. 49;i, Keo- kuk Gr. varsoviensis, Worthen, 1882, (Poterio- crinuH varsoviensis,) Bull. No. 1, III. Ht. Mus. Nat. Hist, p. 20, and Geo. Sur. 111., vol. .', p. 2')0, War- saw Gr. venustus, Worthen, 1882, (Poteriocrinus venuBtus,) Bull. No. 1, 111. St. Mus. Nat. Hist., p. 24, and Geo. Sur. III., vol. 7, p. 297, Kaskaskia Gr. wacAsmufAt, see Graphiocrinus wach- smuthi. whitii. Hall, 1861, Deso. New Crin., p. 7, and Jour. Bost. 8oc. Nat. Hist., vol. 7, p. 30(>, Burlington Gr. Sri, (I'entremites sayi,) Geo. Rep. Mo., p. 185, Burling- ton (ir. ScHizocKiNus, Hall, 1347, Pal. N. Y., vol. 1, p. 81. [Kty. Hchiza, cleft; krinm, lily.] Basals 5; primary radials 3x5; second- ary radial s 2 x 10; interradials 5 or more; arms short, branching, bearing pinnules; column round. Type S. no- dosus. nodosuB, Hall, 1847, Pal. N. Y., vol. 1, p. SI. Trenton Gr. striatus. Hall, 1847, Pal. N, Y., vol. 1, p. 316, Trenton (Jr. Probably belongs to another genuL^ i^(H(ENASTER, Meek & Worthen, 1860, Proc. Acad. Nat. Sci., p. 449, and Geo. Sur. III., vol. 2, p. 277. [Ety. schoinof, rope;. Flo. 427—Sclilzocrl nu8 n<i(lo8UH. aiOer, star.] Pentagonal disk, with angles prodU(^ed into rays; margins be- tween rays concave and'spinous; plates alternating on dorsal side of rays, and on ventral side of disk imbricating in- ward and laterall^K toward the ambu- lacra ; furrows wide, deep, bordered with a single row uf udambulacrals, which become the marginal plates of the free rays. Type S. tiinbriatus. flmbriatuH, Meek & Worthen, 1860,
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