218 



CRTJSTAOEA. 



remipes, DeKay, 1825, Ann. Lye. Nat. 

 Hist. N. Y., Waterlime Gr. [Sig. oar- 

 footed.] 



tetragonopthalmus, Fischer, 1839, Bull. 

 Soc. Imper. Nat. Moscou., Waterlime 

 Gr. [Sig. having square eyes.] 

 Habpes, Goldfuss, 1839, Nova ActaPhysico- 

 medicaAcademise Csesarese Leopoldino 

 Carolinse Naturae Curiosorum, vol. 19. 

 [Ety. harpe, a hook or sickle.] 



antiquatus, Billings, 1859, Can. Nat. &Geo., 

 vol. 4, Chazy Gr. [Sig. ancient, old.] 



consuetus, Billings, 1866, Catal. Sil. Foss. 

 Antic, Anticosti Gr. [Sig. related to, 

 from its close alliance to H. otta- 

 waensis.] 



dentoni, Billings, 1863, Can. Nat. & Geo., 

 Hud. Riv. Gr. [Ety. proper name.] 



escanabiae, Hall, 1851, Geo. Lake Sup. 

 Land Dist., vol. 2, Trenton Gr. [Ety. 

 proper name.] 



granti, Billings, 1865, Pal. Fpss.> Quebec 

 Gr. [Ety. proper name.] 



ottawensis, Billings, 1865, Pal. Foss., 

 Trenton Gr. [Ety. proper name.] 

 Harpides, Beyrich, 1846, Untersuchungen 

 Trilobiten als Fort. [Ety. from re- 

 semblance to the genus HarpesJ] 



atlanticus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Ety. mythological name.] 



concentricus, Billings, 1865, Pal. Foss., 

 Quebec Gr. [Sig. concentrical.] 



desertus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. deserted, solitary.] 

 Helminthoidichnites, Fitch, 1848, Geo. Sur. 

 Wash. Co. [Sig. like little worm 

 tracks.] See Gordia marina. 



marinus, Fitch, 1848, Geo. Sur. Wash. Co., 

 Potsdam Gr. [Sig. marine.] 



tenuis. Fitch, 1848, Geo. Sur. Wash. Co., 

 Potsdam Gr. [Sig. slender.] 

 Hemicrypturus, Green, syn. for Asaphus. 



dintoni, Vanuxem, 1843, Geo. Rep. 3rd 

 Dist. N. Y., Clinton Gr. 



rasoumowski, syn. for Asaphus expansus. 

 HoLOMETOPUs, Angelin, 1852, Palseontologia 

 Scandinavica. [Ety. holos, entire ; me- 

 topon, space between the eyes.] 



angelini, Billings, 1862, Pal. Foss., Quebec 

 Gr. [Ety. proper name.] 

 HoMALONOTUs, Konig, 1825, Icones. Foss. 

 Sectiles. [Ety. homalos, on the same 

 level; notos, the back.] 



dawsoni. Hall, 1860, Can. Nat. & Geo., 

 vol. 5, Silurian. [Ety. proper name.] 



dekayi. Green, 1832, (Dipleura dekayi) 

 Monograph of Trilobites, Ham. Gr. 

 [Ety. proper name.] 



delphinocephalus, Green, 1832, (Tri- 

 merus delphinocephalus) Monograph 

 of Trilobites, Clinton & Niagara Gr. 

 [Sig. dolphin-headed.] 



jacksoni, Green, 1837, (Trimerus jacksoni) 

 Am. Jour. Sci., vol. 32, Up. Sil. [Ety. 

 proper name.] 



knighti, Koninck, 1825, Icones. Foss. 

 Sectiles, Low. Held. Gr. [Ety. proper 

 name.] 



vanuxemi, Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Ety. proper name.] 



Ill^nurus, Hall, 1863, 16th Reg. Rep. N. Y. 



[Ety. from the genus Illsenus; oura 



the tail.] 



quadratus, Hall, 1863, 16th Reg. Rep. N. 



Y., Potsdam Gr. [Sig. square-shaped.] 



Illjenus, Dalman, 1828, ueber die Palseaden 



Oder die sogenannten Trilobiten. 



[Ety. iUaino, to look awry, to squint.] 



americanus, Billings, 1859, Can. Nat. & 

 Geo., vol. 4, Trenton Gr. [Ety. proper 

 name.] 



angusticollis, Billings, 1859, Can. Nat. & 

 Geo., vol. 4, Black Riv. Gr. [Sig. 

 having a narrow neck or column.] 



arcturus. Hall, 1847, Pal. N. Y., vol. 1, 

 Chazy & Black. Riv. Gr. [Ety. proper 

 name.] 



arcuatus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. arched.] 



armatus, Hall, 1867, 20th Reg. Rep., Ni- 

 agara Gr. [Sig. armed.] 



harriemis, Murch, 1839, Sil. Syst. The 

 species formerly identified with this 

 one is described by Prof. Hall as Illse- 

 nus ioxus. 



bayfieldi, Billings, 1859, Can. Nat. & Geo., 

 vol. 4, Chazy Gr. [Ety. proper name.] 



clavifrons, Billings, 1859, Can. Nat. & 

 Geo., Chazy & Black Riv. Gr. [Sig. 

 club-fronted.] 



conifrons, Billings, 1859, Can. Nat. & 

 Geo., Black Riv. Gr. [Sig. having 

 a conical front.] 



conradi, Billings, 1859, Can. Nat. & Geo., 

 vol. 4, Black Riv. Gr. [Ety. proper 

 name.] 



consimilis, Billings, 1865, Pal. Foss., 

 Quebec Gr. [Sig. similar in all parts.] 



consobrinus, Billings, 1865, Pal. Foss., 

 Quebec Gr. [Sig. nearly aUied.] 



cornigerus. Hall, 1872, 24th Reg. Rep. N. 

 Y., Niagara Gr. [Sig. horned.] 



crassicauda, Wahlenberg, 1821,(Entomos- 

 tracites crassicauda) Nov. Act. Soc. 

 Upsal., vol. 8, Trenton & Galena Gr. 

 [Sig. thick-tailed.] 



cuniculus. Hall, 1867, 20th Reg. Rep. 

 N. Y., Niagara Gr. [Sig. a cradle.] 



daytonensis, Hall & Whitfield, 1875, Ohio 

 Pal., vol. 2, Clinton Gr. [Ety. proper 

 name.] 



fraternus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. fraternal.] 



globosus, Billings, 1859, Can. Nat. & Geo., 

 vol. 4, Chazy Gr. [Sig. globose.] 



graftonensis, Meek & Worthen, 1869, 

 Proc. Acad. Nat. Sci. Phil., Niagara 

 Gr. [Ety. proper name.] 



grandis, Billings, 1859, Can. Nat. & Geo., 

 vol. 4, Hud. Riv. Gr. & Mid. Sil. [Sig. 

 grand.] 



imperator. Hall, 1861, Rep. of Progr.Wis., 

 Niagara Gr. [Sig. commander-in- 

 chief.] 



incertus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. uncertain.] 



