SUB-KINGDOM ARTICULATA. 



First Class, 

 Second Class, 

 Third Class, 

 Fourth Class, 

 Fifth Class, 



ANNELIDA. 



CRUSTACEA. 



ARACHNIDA. 



MYRIAPODA. 



INSECTA. 



CLASS ANNELIDA. 



GENERA. — Arenicolites, Conchicolites, Cornulites, Salterella, Serpulites, Spirorbis. 



Arenicolites, Salter, 1856, Quar. Jour. Geo. 



Soc. [Ety. arena, sand ; colo, I inhabit ; 



lithos, stone; circular boles which 



appear in twos on the surface of sand- 

 stones, and having the appearance of 



worm-burrows like those of the Areni- 



cola.~\ 

 spiralis, as identified by Billings, and 



others, Pal. Foss., vol. 2, Huronian 



Gr. [Sig. spiral.] 

 Conchicolites, Nicholson, 1872, Am. Jour. 



Sci. [Ety. concha, a shell ; colo, I 



dwell ; lithos, a stone.] 

 corrugatus, Nicholson, 1872, Lond. Geo. 



Mag.,vol. 9,Cin'ti Gr. [Sig. corrugated.] 

 flexuosus, Hall, 1847, (Tentaculites flex- 



uosus) Pal. N. Y., vol. 1, Trenton & 



Hud. Riv. Gr. [Sig. flexuous.l 

 intermedius, Nicholson, 1874, (Ortonia 



intermedia) Geo. Mag., n. s., vol. 1, 



Ham. Gr. [Sig. intermediate.] 

 minor, Nicholson, 1873, (Ortonia minor) 



Lond. Geo. Mag., vol. 10, Cin'ti Gr. 



[Sig. less.] 

 Cornulites, Schlotheim, 1820, Petrefacten- 



kunde. [Ety. cornu, horn ; lithos, 



stone.] 

 arcuatus, Conrad, 1848, Jour. Acad. Nat. 



Sci., vol. 8, Niagara Gr. [Sig. bent, 



bow-shaped.] 

 flexuosus, Hall, 1852, Pal. N. Y., vol. 2, 



Clinton Gr. [Sig. wavy.] 

 flexuosus ear. gracilis, Hall, 1860, Can. 



Nat. & Geo., vol. 5, Silurian. [Sig. 



slender.] 

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



Niagara Gr. [Sig. peculiar, lasting.] 



Ortonia, Nicholson, 1872, Lond. Geo. Mag., 

 vol. 9. This is a synonym for Conch- 

 icolites, if indeed both are not syn- 

 onyms for Cornulites. 



conica, syn. for Conchicolites flexuosus. 



intermedia, see Conchicolites intermedius. 



minor, see Conchicolites minor. 

 Salterella, Billings, 1861, Pal. Foss., vol. 

 1. [Ety. proper name.] 



billingsi, Safford, 1869, Geo. of Tenn., 

 Trenton Gr. [Ety. proper name.] 



obtusa, Billings, 1861, Pal. Foss., vol. 1, 

 Potsdam Gr. [Sig. obtuse.] 



pulchella, Billings, 1861, Pal. Foss., vol. 

 1, Potsdam Gr. [Sig. very beautiful.] 



rugosa, Billings, 1861, Pal. Foss., vol. 1, 

 Potsdam Gr. [Sig. wrinkled.] 

 Serpida, Linnaeus, 1758, Syst. Nat., 10th ed. 

 [Ety. serpo, to creep.] 



omphalodes, see Spirorbis omphalodes. 



valvata, see Spirorbis valvatus. 

 Serpulites, McLeay, 1839, Murch. Sil. Syst. 

 [Ety. Serpula, a genus of annelids.] 



anhulatus, Dawson, 1868, Acad. Geol., 

 Carboniferous. [Sig. ringed.] 



dissolutus, Billings, 1862, Pal. Foss., vol. 

 1, Trenton Gr. [Sig. weak, broken.] 



hortonensis, Dawson, 1868, Acad. Geol., 

 Carboniferous. [Ety. proper name.] 



inelegans, Dawson, 1868, Acad. Geol., 

 Carboniferous. [Sig. not elegant.] 



murchisoni, Hall, 1861, Geo. Rep. Wis., 

 Potsdam Gr. [Ety. proper name.] 



splendens, Billings, 1859, Can. Nat. and 

 Geo., vol. 4, Chazy Gr. [Sig. splendid. ] 



