. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. REM.] CRUSTACEA. 565 Bull. Buf. 8(j. Fia. BMOStris. forward from the eyes, so as to intersect the anterior margin within a point where a line would cut it if drawn through each eye parallel with the axis (Corda's figure makes the facial sutures cut the margin laterally, in a line drawn at right angles to the anterior end of the glabella); these lines extend them- selves from the eyes to the post
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. REM.] CRUSTACEA. 565 Bull. Buf. 8(j. Fia. BMOStris. forward from the eyes, so as to intersect the anterior margin within a point where a line would cut it if drawn through each eye parallel with the axis (Corda's figure makes the facial sutures cut the margin laterally, in a line drawn at right angles to the anterior end of the glabella); these lines extend them- selves from the eyes to the posterior margin by making a douMe curve, and cut the margin within or near the lat- eral angles; fixed rheek arched down- ward at the sides; occipital ring spined; thoracic segments fourteen; ends of pleurffi pointed or rounded; pygidium medium size, six or seven articnlations in the axis; surface of test with minute punctures or scattered tubercles. Type P. striata. aflinis, Walcott, 1884, Mon. U. S. Geo. Sur., p. 54, Potsdam Gr. anatina. Hall, 1863, (Gonocephalites ana- tinus,) 16th Rep. N. Y. St. Mus. Nat. Hist, p. 158, Potsdam Gr. {?)annectans, Walcott, 1884, Mon. U. S. (ieo. Sur., vol. 8, p. 91, Pogonip Gr. actiquatus, Salter, 1859, (Gonocephalites antiquatus,) Jour. Geo. Soc, vol. 15, p. 554, Up. Taconic. arenosa, Billings, 1861, (Gonocephalites arenosus,) Pal. Foss., vol. 1, p. 15, Pots- dam Gr. billin^i, Shumard, 1861, (Gonocephalites billiDgsi,) Am. Jour. Sci. and Arts, vol. 32, p. 220, Potsdam Gr. binodosa. Hall, 1863, (Gonocephalites bi- nodosa,) 16th Rep. N. Y. Pt. Mus. Nat. Hist., p. 160, Potsdam Gr. breviceps, Walcott, 1884, Mod. U. 8. Geo. Sur., vol. 8, p. 49, Potsdam Gr. calciferus, Walcott, 1879, (Gonocephalites calciferus,) 32d Rep. N. Y. St. Mus. Nat. Hist., p. 129, Oalciferons Gr. calymenoides, Whitfield, 1877, Geo. Sur. Wis., vol. 4, p. 179, Potsdam. Gr. clavata, Walcott, 1877, Am. Jour. Sci., 3d ser., vol. 34, p. 198, Up. Taconic. cordillerse, Rominger, 18
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