CRTISTAOEA. 



219 



indeterminatus, Walcott, 1877, 29th Reg. 



Rep. N. Y., Black Riv. Gr. [Sig. not 



determined.] 

 insignia, Hall, 1867, 20tli Reg. Rep. N.Y., 



Niagara Gr. [Sig. distinguished by a 



ioxus, Hall, 1847, 20th Reg. Rep. N. Y., 



Niagara Gr. [Ety. mythological 



name.] 

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



Trenton Gr. [Sig. broad-backed.] 

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



vol. 4, Black River and Trenton Gr. 



[Ety. proper name.] 

 orbicaudatus, Billings, 1859, Can. Nat. & 



Geo., vol. 4, Hud. Riv. Gr. &Mid. Sil. 



[Sig. having a circular tail.] 

 ovatus, Conrad, 1843, Proc. Acad. Nat. 



8ci. Phil., vol. 1, Black Riv. Gr. [Sig. 



egg-shaped.] 

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

 bec Gr. [Sig. imitator.] 

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



Sur., Trenton & Galena Gr. [Ety. 



mythological name.] 

 trentonensis, Emmons, 1842, (Bumastus 



trentonensis) Geo. Rep. N. Y., Tren- 

 ton Gr. [Ety. proper name.] 

 tumidifrons, Billings, 1865, Pal. Foss., 



Quebec Gr. [Sig. swollen out in front. ] 

 vindex, Billings, 1865, Pal. Foss., Ghazy 



Gr. [Sig. a defender, a revenger.] 

 tvortfienanus, syn. for Illsenus insignis. 

 IsoCHiUNA, Jones, 1858, Can. Org. Rem., 



Decade 3. [Ety. isos, equal ; cheilos, lip.] 

 cylindrica. Hall, 1852, (Cytherina cylin- 



drica) Pal. N. Y., vol. 2, Medina Gr. 



[Sig. cylindrical.] 

 gracilis, Jones, 1858, Can. Org. Rem., 



Decade 3, Black Riv. Gr. [Sig. 



slender.] 

 Ottawa, Jones, 1858, Can. Org. Rem., De- 

 cade 3, Black Riv. Gr.' [Ety. proper 



name.] 

 IsoTELUs, DeKay, 1825, Annals Lyceum Nat. 



Hist. N. Y., vol. 1. [Ety. isos, equal; 



telos, end.] A subgenus of Asaphus. 

 canalis, Conrad, 1847, Pal. N. Y., Trenton 



& Hud. Riv. Gr. [Sig. a groove or 



channel.] 

 gigas, DeKay, 1825, Ann. Lye. Nat. Hist. 



N. Y., vol. 1, Trenton & Hud. Riv. Gr. 



[Sig. a giant.] 

 max-imm, see Isotelus megistos. 

 megistos, Locke, 1841, Proc. Am. Assoc, 



Trenton & Hud. Riv. Gr. [Sig. very 



large.] 

 vigilans. Meek & Worthen, 1870, Proc. 



Acad. Nat. Sci. Phil., Cin'ti. Gr. [Sig. 



watching.] 

 Leaia, Jones, 1862, App. to Mon. Foss., 



Estheriffi. [Ety. proper name.] 

 leidyi. Lea, 1856, (Cypricardia leidyi) 



Proc. Acad. Nat. Sci., vol. 7, Coal 



Meas. [Ety. proper name.] 

 tricarinata. Meek & Worthen, 1868, Geo. 



Sur. 111., vol. 3, Coal Meas. [Sig. 



three-keeled.] 



Lkpeeditia, Roualt, 1851, Bull. Soc. Geo. 



France, 2nd series, t. 8. [Ety. Upis, 



a scale ; dittos, double.] 

 alta, Conrad, 1843, (Cytherina alta) Geo. 



Rep. 3rd Dist. N. Y., Low. Held. Gr. 



[Sig. high.] 

 amygdalina, Jones, 1858, Can. Org. Rem., 



Decade 3, Black Riv. Gr. [Sig. like an 



almond.] 

 anna, Jones, 1858, Can. Org. Rem., De- 

 cade 3, Calciferous Gr. [Ety. proper 



name.] 

 anticostiana, Jones, 1858, Can. Org. Rem., 



Decade 3, Hud. Riv. Gr. [Ety. proper 



name.] 

 arctica, Jones, 1856, Ann. & Mag. Nat. 



Hist., 2nd series, vol. 17, Up. Sil. 



[Sig. northern, arctic] 

 bivia. White, 1874, Rep. Invert. Foss., 



Quebec Gr. [Sig. having two ways or 



passages.] 

 byrnesi, S. A. Miller, 1874, Cin. Quar. 



Jour. Sci., vol. 1, Cin'ti Gr. [Ety. 



proper name.] 

 canadensis, Jones, 1858, Ann. Nat. Hist., 



3rd series, vol. 1, Ohazy to Trenton 



Gr. [Ety. proper name.] 

 capax, Saflford. Not defined, 

 cayuga. Hall, 1862, 15th Reg. Rep. N. Y., 



Cornif. Gr. [Ety. proper name.] 

 concinnula, Billings, 1865, Pal. Foss., 



vol. 1, Quebec Gr. [Sig. small and 



beautiful.] 

 cylindrica, Hall, 1871, Pamphlet, Cin'ti 



Gr. [Sig. cylindrical.] 

 faba, Hall, 1876, 28th Reg. Rep. N. Y., 



Niagara Gr. [Sig. a bean.] 

 fabulites, Conrad, 1843, (Cytherina fabu- 



lites) Proc. Acad. Nat. Sci. Phil., 



Trenton Gr. [Sig. a small bean.] 

 fonticola. Hall, 1867, 20th Reg. Rep. N. 



Y., Niagara Gr. [Sig. fountain-dwell- 

 ing.] 

 gibbera, Jones, 1856, Ann. & Mag. Nat. 



Hist., 2nd series, vol. 17, Niagara Gr. 



[Sig. humpbacked.] 

 gracilis, see Isochilina gracilis, 

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



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

 jonesi. Hall, 1859, Pal. N. Y., vol. 3, Low. 



Held. Gr. [Ety. proper name.] 

 josephana, Jones, 1858, Can. Org. Rem., 



Decade 3, Black Riv. to Trenton Gr. 



[Ety. proper name.] 

 labrosa, Jones, 1858, Can. Org. Rem., De- 

 cade 3, Chazy Gr. [Sig. having a rim 



or border.] 

 louckana, Jones, 1858, Can. Org. Rem:, 



Decade 3, Black Riv. Gr. [Ety. proper 



name.] 

 marginata, Keyserling, 1846, Wissen- 



schaftliche Beobachtungen, etc., Ni- 

 agara Gr. [Sig. bordered.] 

 minutissima. Hall, 1871, Pamphlet, Cin'ti 



Gr. [Sig. very small.] 

 morgani, Saflford. Not defined, 

 nana, Jones, 1858, Can. Org. Rem., De- 

 cade 3, Calciferous Gr. [Sig. dwarfish. ] 



