218 



CRUSTACEA. 



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- 

 medicaAcademiae Csesarese Leopoldino 

 Carolinse Natura Ouriosorum, vol. 19. 

 [Ety. harpe, a hook or sickle.] 



antiquatus, Billings, 1 859,Can. Nat. & Geo. , 

 vol. 4, Chazjr 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.] 



escanabise. Hall, 1851, Geo. Lake Sup. 

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

 proper name.] 



granti, Billings, 1865, Pal. Foss., Quebec 

 Gr. [Ety. proper name.] 



ottawensis, Billings, 1865, Pal. Foss., 

 Trenton Gr. [Ety. proper name.] 

 Hakpides, Beyrich, 1846, Untersuchungen 

 Trilobiten als Fort. [Ety. from re- 

 semblance to the genus Harpes.l 



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. 



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

 Dist. N. Y., Chnton Gr. 



rasoumowsH, syn. for Asaphus expansus. 

 HoLOMETOPCS, Angelin, 1852, Palseontologia 

 Scandinavica. [Ety. holos, entire ; me- 

 topon, space hetween 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 dekavi) 

 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 lUsenus; oura 



the tail.] 

 quadratus, Hall, 1863, l(5th Reg. Rep. N. 



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

 Ill^nus, Dalman, 1828, ueber die Palseaden 



oder die sogenannten Trilobiten. 



[Ety. iUairu), to look awry, to squint.] 

 americanus, Billings, 1869, 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.] 

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

 agara Gr. [Sig. armed.] 

 harrieivsk, Murch, 1839, Sil. Syst. The 



species formerly identified with this 



one is described by Prof. Hall as lllx- 



nus ioxiti. 

 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 allied.] 

 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. Fobs., Que- 

 bec Gr. [Sig. fraternal.] 

 globoBus, 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.] 



