CRUSTACEA. 



223 



septem-notatus, Owen, 1852, Jour. Geo. 



Soc, vol. 8, Quebec Gr. [Sig. having 



seven marks.] 

 Ptbrygotus, Agassiz, 1839, in Murch. Sil. 



Syst. [Ety. pteron, wing; oxis, ear.] 

 cobbi, Hall, 1859, Pal. N. Y., vol. 8, 



Waterlime Gr. [Ety. proper.] 

 macrophthalmus. Hall, 1859, Pal. N. Y., 



vol. 3, Waterlime Gr. [Sig. long- 

 eyed.] 

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



Waterlime Gr. [Ety. proper name.] 

 Ptychaspis, Hall, 1863, 16th Reg. Rep. N. Y. 



[Ety. ptycke, folding or doubling ; 



aspis, a shield.] 

 barabuensis, Winchell, 1864, Am. Jour. 



Sci. & Arts, 2d series, vol. 37, Potsdam 



Gr. [Ety. proper name.] 

 granulosa, Owen, 1852, (Dikelocephalus 



granulosus) Rep. Iowa, Wis. & Minn., 



Potsdam Gr. [Sig. covered with 



granules.] 

 miniscaensis, Owen, 1852, (Dikelocepha- 

 lus miniscaensis) Rep. Wis., Iowa & 



Minn., Potsdam Gr. [Ety. proper 



name.] 

 sesostris, Billings, 1865, (Dikelocephalus 



sesostris) Pal. Foss., vol. 1, Quebec Gr. 



[Ety. proper name.] 

 Rbmopleuridbs, Portlock, 1843, Rep. Geol. 



Lond. [Ety. remus, an oar ; pleura, a 



rib.] 

 affinis, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. related to.] 

 canadensis, Billings, 1865, Pal. Foss., vol. 



1, Chazy Gr. [Ety. proper name.] 

 panderi, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Ety. proper name.] 

 schlotheimi, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Ety. proper name.] 

 striatulus, Walcott, 1875, Cin. Quar. Jour. 



Sci., vol. 2, Trenton Gr. [Sig. having 



little strise.] 

 Rhabdichnites, Dawson, 1875, Can. Nat. & Geo. 



Name proposed. 

 RusiCHNiTES, Dawson, 1861, Can. Nat. & Geo. 



[Ety. msos, wrinkled ; ichnos, a track.] 



Supposed track of a small Limulus. 

 acadicus, Dawson, 1861, Can. Nat. & Geo., 



Coal Meas. [Ety. proper name.] 

 Shumardia, Billings, 1862, Pal. Foss., vol. 1. 



[Ety. proper name.J 

 glacialis, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. icy, frozen.] 

 granulosa, Billings, 1862, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. covered with gran- 

 ules.] 

 Solenocam, Meek, 1872, subgenus of Cerati- 



ocaris. 

 SoLENOPLEUBA, as used by BilUngs, 1874, Pal. 



Foss., vol. 2. [Ety. Solen, the razor 



flsh ; pleura, a rib.] 

 communis, Billings, 1874, Pal. Foss., vol. 



2, Potsdam Gr. [Sig. common, in 

 large numbers.] 



Sph^bexochus, Beyrich, 1845, Monograph 

 of Trilobites. [Ety. sphaira, a ball; 

 exochos, prominent] 



canadensis, Billings, 1866, Catal. Sil. 

 Foss. Antic, Anticosti Gr. [Ety. 

 proper name.] 



mirm, Beyrich, see Sphserexochus rom- 

 ingeri. 



parvus, Billings, 1865, Pal. Foss., Chazy 

 & Black Riv. Gr. [Sig. small.] 



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



Y., Niagara Gr. [Ety. proper name.] 



Sph;ebooobyphe, Angelin, 1852, Palseonto- 



logia Scandinavica. [Ety. sphaira, a 



ball; koryphe, the top of the head.] 



robustus, Walcott, 1875, Cin. Quar. Jour. 

 Sci., vol. 2, Trenton Gr. [Sig. robust.] 



salteri, Billings, 1866, Catal. Sil. Foss. 

 Antic, Anticosti Gr. [Ety. proper 

 name.] 

 Telephus, Barrande. [Ety. mythological 

 name.] 



americanus, Billings, 1865, Pal. Foss., vol. 

 1, Quebec Gr. [Ety. proper name.] 

 Terataspis, Hall, 1863, 16th Reg. Rep. N. Y. 

 [Ety. teras, a marvel; aspis, shield.] 

 A subgenus of Acidaspis. 



grandis. Hall, 1862, 15th Reg. Rep. N. 

 Y., (Lichas grandis) Schoharie grit. 

 [Sig. grand.] 



eriopia. Hall, 1863, (Lichas eriopis) 16th 

 Reg. Rep. N. Y., Up. Held. Gr. [Ety. 

 mythological name.] 

 Thaleops, Conrad, 1843, Proc. Acad. Nat. 

 Sci., vol. 1. [Ety. </iotos, a stalk ; ops, 

 an eye.] 



ovata, Conrad, 1843, Proc. Acad. Nat. Sci., 

 vol. 1, Trenton Gr. [Sig. ovate.] 

 Triaethrella, Hall, 1863, 16th Reg. Rep. 

 N. Y. [Ety. diminutive of Triarthrus.'] 



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

 Y., Potsdam Gr. [Sig. in the morning.] 

 Triarthrus, Green, 1832, Monograph of 

 Trilobites. [Ety. triarthrus, three- 

 jointed.] 



becki, Green, 1832, Monograph of Trilo- 

 bites, Trenton & Hud. Riv. Gr! [Ety. 

 proper name.] 



spinosus, Billings, 1857, Rep. of Progr., 

 Trenton Gr. [Sig. full of spines.] 



trilineatus, Emmons, 1844, (Atops trilin- 

 eatus) Taconic Syst., Potsdam Gr. 

 [Sig. three-lined.] 

 Trimerus, syn. for Homalonotus. 



delphinocephalus, see Homalonotus del- 

 phinocephalus. 



jacksoni, see Homalonotus jacksoni. 

 Trinucleus, L h w y d , (or as he spelt it 

 Llhwydd) 1698, Phil. Trans., vol. 20. 

 [Ety. trinucleus, three-kerneled.] 



concentricus, Eaton, 1832, (Nuttainia 

 concentrica) Geo. Text Book, Trenton 

 & Hud. Riv. Gr. [Sig. from the con- 

 centrical arrangement of the punc- 

 tures.] 



tessellatus. Green, 1832, (Cryptolithus tes- 

 sellatus) syn. for Trinucleus concen- 

 tricus. 



