. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. £30 CRUSTACEA. [AHC—AS\ vermiformiB, Meek, 1872, Proc. Acad. Nat. Sci. Phil., p. 335, and Ohio Pal., vol. 2, p. 321, SuDcarbonirerous. Arctinurui, Gtistelnau, 1843, Syst Syl., p. 21, ayn. for Lichas. Arethmimi, Barrande, 1852, Syst. Sil. Bob. Not yet known as an American gnnus. (?) americana, Wulcott, 1885, Monogr. U. 8. Geo. Sur., vol. 8, p. 02, Potsdam Gr. Founded upon a fragment of a cephalic shield which does
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. £30 CRUSTACEA. [AHC—AS\ vermiformiB, Meek, 1872, Proc. Acad. Nat. Sci. Phil., p. 335, and Ohio Pal., vol. 2, p. 321, SuDcarbonirerous. Arctinurui, Gtistelnau, 1843, Syst Syl., p. 21, ayn. for Lichas. Arethmimi, Barrande, 1852, Syst. Sil. Bob. Not yet known as an American gnnus. (?) americana, Wulcott, 1885, Monogr. U. 8. Geo. Sur., vol. 8, p. 02, Potsdam Gr. Founded upon a fragment of a cephalic shield which does not belong to this genus. Arges, Goldfuss, 1839, Nova Acta Pliys. Acad. Caes. Leop. Nat. Cur. Not American. ArioneUus, Barrande, 1852, Syst. >Sil. Boh., syn. for Agraulus. tnpunetatm, see Agraulus bipunctatus. cxmvexus, see Agraulus convexus. cylindricuH, see Agraulus cylindricus. owem, see Crepicephalus oweni. planus, see Agraulus planus. pmtulatiu, see Agraulus pustulatus. quadrangularis, see Agraulus quadrangu- laris. mbclavalui, see Agraulus subclavatus. texanua, see Agraulus texanus. tripunctatus, see Agraulus tripunctatus. Aristozoe, Barrande, 1872, Syst. Sil. Boh., vol. 1, p. 477. [Ety. arislot, best; zoon, animal.] Carapace bivalve; test tliin ; binge-line straight; ventral margin grooved and reflected; tubercle near anterior margin. Type A. bisulcata. rotundata, Walcott, 1887, Am. Jour. Sci. and Arts, 3d ser., vol. 4, p. 193, Up. Taconic. troyensis. Ford, 1873, (Leperditia troyen- SIS,) Am. Jour. Sci. and Arts, 3d ser., vol. 6. p. 138. Up. Taconic. AsAPHiscus, Meek, 1873, 6th Rep. Hayden's Geo. Sur. Terr., p. 485. [Ely. from the genus Aanphtis.} Distinguished from Asaphus by having nine thoracic seg- ments, a conical and well-defined gla- bella, without lateral lobes, the furrow at the anterior margin of the head, and less arcuate eyes more remote from the glabella; distinguished from BathyurelluB by having its conical glabelladepressed, and the margin of the
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