198 



CCELENTERATA. 



[NEB. PAC. 



vol. 2, under the name of Chetetes dalii, 

 Hud. Riv. Gr. Ulrich refers it to Cal- 

 lopora. 



rectangularis, Whitfield, 1878, Ann. Rep. 

 Geo. Sur. Wis., p. 70, and Geo. Wis., 

 vol. 4, p. 249, Hud. Riv. Gr. 



rugosa, Hall, 1847, (Chetetes rugosus,) 

 Pal. N. Y., vol. 1, p. 67, Trenton Gr. 



rugosa, Edwards & Haime, 1851, Pol. Foss. 

 de Terr. Pal., is merely a variety or 

 form of M. ramosa, and associated with 

 it in the Hud. Riv. Gr. 



ielwyni, see Prasopora selwyni. 



selwyni var. hospitalis, see Prasopora sel- 

 wyni var. hospitalis. 



solitaria, Ulrich, 1883, (Heterotrypa soli- 

 taria,) Jour. Gin. Soc. Nat. Hist, vol. 6, 

 p. 88, Hud. Riv. Gr. 



subglobosa, Ulrich, 1879, (Chetetes sub- 

 globosus,) Jour. Cin. Soc. Nat. Hist., 

 vol. 2, p. 129, Hud. Riv. Gr. 



subpulchella, Nicholson, 1875, (Chetetes 

 subpulchellus,) Ohio Pal., vol. 2, p. 

 196, Hud. Riv. Gr. 



trentonensis, Nicholson, 1881, Struct, and 

 Affin. Montic., p. 149, Trenton Gr. 



tuberculata, see Spatiopora tuberculata. 



ulrichi, Nicholson, 1881, Struct, and Affin. 

 Montic., p. 131, Hud. Riv. Gr. 



undulata, Nicholson, 1875, (Chetetes 

 undulatus,) Pal. of Ont., p. 10, and 

 Struct, and Affin. Montic., p. 170,*Tren- 

 ton and Hud. Riv. Gr. 



uniformis, Ulrich, 1882, (Peronopora 

 uniformis,) Jour. Cin. Soc. Nat. Hist., 

 vol. 5, p. 244, Hud. Riv. Gr. 



vaupeli, Ulrich, 1883, (Heterotrypa vau- 

 peli,) Jour. Cin. Soc. Nat. Hist., vol. 6, 

 p. 85, Hud. Riv. Gr. 



venusta, Ulrich, 1878, (Chetetes venustus,) 

 Jour. Cin. Soc. Nat. Hist., vol. 1, p. 93, 

 Utica Slate. 



westoni, Foord, 1883, Cont. to Micro-Pal., 

 p. 7, Trenton Gr. 



wetherbyi, Ulrich, 1882, Jour. Cin. Soc. 

 Nat. History, vol. 5, p. 239, Trenton Gr. 



whiteavesi, Nicholson, 1879, Pal. Tab. 

 Corals, p. 316, and Struct, and Affin. of 

 Montic., p. 160, Trenton Gr. 

 NEBULIPORA, McCoy, 1850, Ann. and Mag. 

 Nat. Hist., 2d ser., vol. 6, p. 284. [Ety. 

 nebula, thick mist ; poros, pore.] In- 

 crusting or forming lenticular masses, 

 with a concentrically wrinkled epitheca 

 below, composed of small prismatic 

 corallites perpendicular to the upper 

 surface, with clusters of rather larger 

 size, all in contact ; tabulfe at regular dis- 

 tances ; no septa. Type N. explanata. 



papillata, McCoy, 1850, Ann. and Mag. 

 Nat. Hist., vol. 6, p. 284, Hudson 

 Riv. Gr. 



NEMAGRAPTUS, Emmons, (Nemagrapsus,) 

 1856, Am. Geo., pt. 2, p. 109. The 

 termination graptus is preferred be- 

 cause grapsus is used in the nomen- 

 clature of Crustacea. [Ety. nema, 

 thread; grap}io, I write.] Axis elon- 

 gated and thread-like, simple or com- 



pound branches, round at the base, and 

 flattened at the extremities ; cells ar- 

 ranged on the flattened part of the axis 

 instead of the margin. Type N. elegans. 

 capillaris, Emmons, 1856, Am. Geo., pt. 



2, p. 109, Up. Taconic. 

 elegans, Emmons, 1856, Am. Geo., pt. 2, 



p. 109, Up. Taconic. 



NYCTOPORA, Nicholson, 1879, Pal. Tab. 

 Corals, p. 182. [Ety. nuktos, night; 

 poros, pore.] Corallum composite, 

 massive ; corallites polygonal, in con- 

 tact; walls thin, amalgamated; mural 

 pores numerous, small; septa, in the 

 form of marginal vertical ridges ; 10 to 

 15 in each corallite ; tabulae numerous, 

 complete, horizontal. Type N. billingsi. 

 billingsi, Nicholson, 1879, Pal. Tab. 



Corals, p. 184, Trenton Gr. 

 OLDHAMIA, Forbes, 1850, Dub. Geo. Jour. 

 [Ety. proper name.] Strong stems, 

 with branches arranged in whorls ; sub- 

 stance corneous ; cellules undetermined. 

 Type O. antiqua. 

 antiqua, Forbes, 1850, Dub- 

 lin Geo. Jour., Pots- 

 dam Gr. 



fruticosa, Hall, 1865, Can. 

 Org: Rem. Decade 2, p. 

 50, Trenton Gr. 

 OMPHYMA, Rafinesque, 1820, 

 Ann. des Sci. Phys. d 

 Bruxelles, vol. 5, p. 234. 

 [Ety. omphax, precious 

 stone.] Simple, tur- 

 binate, wall with rudi- FIG. 199. Old- 

 men tary epitheca, pro- ha mi a an- 

 ducing radiciform ap- tiqua - 

 pendages; septa numerous, equally de- 

 veloped and divided into four groups 

 by an equal number of shallow fos- 

 sulae; tabulae smooth toward the 

 center. Type 0. turbinata. 



congregata, Billings, 1866, 

 Catal. Sil. Foss. Antic., 

 p. 93, Clinton and Ni- 

 agara Gr. 



drummondi, Billings, 1866, 

 Catal. Sil. Foss. Antic., 

 p. 93, Clinton and Ni- 

 agara Grs. 



stokesi, Edwards & Haime, 

 1851, (Ptychophyllum 

 stokesi,) Polyp. Foss. 

 Pal., p. 407, "and Geo. 

 Wis., vol. 4, p. 279, Ni- 

 agara Gr. 



verrucosa, Rafinesque & 

 Clifford, 1820, Monog. d. 

 Turbinolides in Ann. d. 

 Phys. d. Brux., t. 5, p. 

 235, Niagara Gr. 

 PACHYPHYLLUM, Edwards & Haime, 1850, 

 Brit. Foes. Corals, p. Ixviii. [Ety. 

 pachys, thick; phyllon, leaf.] Corallum, 

 composite, increasing by lateral gem- 

 mation ; corallites united by the de- 

 velopment of the costee and exotheca ; 

 tabnlre abundant. Type P. bouchardi. 



FIG. 2CO. Om- 

 p h y m a tur- 

 binata. 



