. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. 698 PISCES. [CIS.âHA R. like PeltodiiB, but distingniahed by the cleft condition of the crest. Type F. bifiduB. bifiduB, St. John & Worthen, 1875, Geo. 8ur. 111., vol. 6, p. 414, Kaskaskia Gr. tricuspidatua, St. John & Worthen, 1876, Geo. Sur. III., vol 6, p. 416, Kaskas- kia Gr. Gampsacanthus, St. John & Worthen, 1876, Geo. Sur. 111., vol. 6, p. 471. [£ty. gamptot, curved; akanlha, spine.] Spines
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. 698 PISCES. [CIS.âHA R. like PeltodiiB, but distingniahed by the cleft condition of the crest. Type F. bifiduB. bifiduB, St. John & Worthen, 1875, Geo. 8ur. 111., vol. 6, p. 414, Kaskaskia Gr. tricuspidatua, St. John & Worthen, 1876, Geo. Sur. III., vol 6, p. 416, Kaskas- kia Gr. Gampsacanthus, St. John & Worthen, 1876, Geo. Sur. 111., vol. 6, p. 471. [£ty. gamptot, curved; akanlha, spine.] Spines long, laterally com- pressed, tapering, costate, with larger and smaller tubercles; posterior margin denticulate; base expanded ; pulp cav- ity large. Type G. typus. Fio. â o (1 uti b 1- fldUB. irishi, St. John & Worthen, 1876, Co. Sur. 111., vol. 6, p. 447, Kinderhook nr Waverly Gr. petrodoides, St. John & Worthen, ,') Geo. Sur. III., vol. 7, p. 260, Kankiis' kia Gr. rudis, St. John & Worthen, , (iio Sur. III., vol. 7, p. 249, Keokuk Gr. Qlyptolbpir, AgHSRiz, 1830, Poiss. F( Hs., vol. 2, p. 179. [Kty. glyptoB, sculptund; lepii, Bcale.] Fins long, sometimes |ii>n- dulous; anterior dorsal opposite ven- tral, and posterior dorsal opposite anal; tail fin long, spreading below ; shoulder bones huge; teeth minute; sralcH of great size in proportion to the animiil, and deeply sculptured. Type G. el- egans. microlepidotus, Agassiz, 1836, Poi^A. Foss., vol. 2, p. 179, Devonian. y.''; ^^ â ^-^^' quebecensis, Whiteaves, 1889, Trans. r':' ' a^ Roy. Soc. Can., vol. 6, p. 77, Low. Devonian. Gnatiiorhiza, Cope, 1883, Proc. Am. Phil. Soc, vol. 20, p. 629. [Kiy. gnathos, jaw; rhiza, root.] Founded upon some ganoine teeth. The def- inition is too meager for identilira- tion, and the genus may never again be recognized. Type G. serrata. serrata. Cope, 1883, Proc. Am. Phil. Soc, vol. 20, p. 629, Permian. latuB, St. John & Worthen, 1876, Geo. | Gyr
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