STR. SYR.] 



CCELENTERATA. 



205 



FIG. 220. Strep- 

 telasma rectum. 



rectum, Hall, 1843, (Strombodes rectus, 

 Geo. Rep. 4th Dist. N. Y., p. 200, an 

 Illust.Dev.Foss., pi. 19, 

 Ham. Gr. 



rnsticum, Billings, 1858, 

 (Petraia rustica,) Rep. 

 of Progr. Geo. Sur. Cau., 

 p. 168, Hud. Riv. Gr. 

 selectum, Billings, 1865, 

 (Petraia selecta,) Can. 

 Nat. and Geo., 2d ser,, 

 vol. 2, p. 429, Mid. Sil. 

 simplex, Hall, 1882, Foss. 

 Corals Niagara and Up. 

 Held. Grs., p. 18, and 

 12th Rep. Geo. Ind., 

 p. 277, Up. Held. Gr. 

 spongiaxis, Rominger, 

 1876, Foss. Corals, p. 144, Niagara Gr. 

 strictum, Hall, 1874, 26th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 114, Low. Held. Gr. 

 tenue, Hall, 1882, Foss. Corals Niagara 

 and Up. Held. Grs., p. 17, and 12th 

 Rep. Geo. Ind., p. 278, Up. Held. Gr. 

 ungula, Hall, 1876, Illust. Dev. Foss., pi. 



19, Ham. Gr. 



waynensis, Safford, 1869, (Petraia way- 

 nensis,) Geo. of Tenn., p. 314, Low. 

 Held. Gr. 



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

 p. 156. [Ety. striatus, striated ; poros, 

 pore.] Ramose; corallites thick-walled, 

 angular, conical ; cells opening upon 

 the surface in expanded, angular, cup- 

 like depressions, which are longitudi- 

 nally striated, and between the striae the 

 bands may bear spinules ; tabulae and 

 mural pores common. Type S. nVxuosa. 

 carbonaria, White, 1862, Proc. Bost. Soc. 



Nat. Hist., vol. 9, Burlington Gr. 

 cavernosa, Rominger, 1876, Foss. Corals, 



p. 60, Corniferus Gr. 

 flexuosa, Hall, 1852, Pal. N. Y., vol. 2, p. 



156, Niagara Gr. 

 formosa, Billings, 1860, Can. Jour., vol. 5, 



p. 254, Up. Held. Gr. 

 huronensis, Rominger, 1876, Foss. Corals, 



p. 58, Niagara Gr. 



iowensis, Owen, 1840, (Cyathoporaiowen- 

 sis,) Rep. on Min. Lands of Iowa, etc., 

 p. 69, Ham. Gr. 

 issa, Hall, 1874, 26th Rep. N. Y. St. Mus. 



Nat. Hist., p. 114, Low. Held. Gr. 

 limbata, Eaton, 1832, (Madreporalimbata,) 

 Geo. Text Book, p. 30, and 

 Illust. Dev. Foss., pi. 33, 

 Ham. Gr. 



linna>ana, Billings, 1860. Can. 

 Jour., vol. 5, p. 253, Ham. 

 Gr. 



misouriensis, Meek & 

 Worthen, 1868, Geo. Sur. 

 111., vol. 3, p. 369, Low. 



Held. Gr. p IG 221 stri- 



rugosa, Hall, 1858, Geo. of atopora lin- 

 lowa, p. 479, syn. for S. uaiana. 

 iowensis. 



STROMBODES, Schweieger, 1820, Handb. der 

 Naturg., p. 418. [Ety. strombos, twisting.] 



Composite, increasing by calicular gem- 

 mation ; corallites constituted prin- 

 cipally by a series of superposed, in- 

 vaginated, infundibuliform tabulae, 

 united by ascending trabiculae, so as to 

 form a columnar mass ; calices pen- 

 tagonal, well circumscribed, and com- 

 pletely covered with the septal radii; 

 outer walls not well developed, and inner 

 mural investment rudimentary. Type 

 S. pentagonus. 



alpenensis, Rominger, 1876, Foss. Corals, 

 p. 133, Ham. Gr. Is this a syn. for S. 

 mammillaris? 



diffluens, Edwards & Haime, 1851, Pol. 

 Fos. des Terr. Pal., p. 431, AuticostiGr. 



distortus, Hall, 1843, Geo. Rep. 4th Dist. 

 N. Y., p. 209, Ham. Gr. Too imper- 

 fectly described for recognition. Prob- 

 ably a Heliophyllum. 



eximius, Billings, 1866, Catal, Sil. Foss. 

 Antic., p. 93, Clinton and Niagara Grs. 



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

 p. 113, Mid. Sil. 



helianthoides, (?) Heliophyllum halli. 



mammillaris, Owen, 1840, (Astrea mam- 

 millaris,) Rep. on Min. Lands, p. 70, and 

 Rominger, in Pal. Foss., p. 133, Ni- 

 agara Gr. 



FIG. 222. Strombodes pentagonus. 



pentagonus, Goldfuss, 1826, Germ. Petref. 

 p. 62, Niagara Gr. 



pygnueus, Rominger, 1876, Foss. Corals, 

 p. 132, Niagara Gr. 



(?) rectus, see Streptelasma rectum. 



separatus, Ulrich, 1886, Cont. to Am. Pal., 

 p. 32, Niagara Gr. 



simplex, see Zaphrentis simplex. 



striatus, D'Orbigny, 1850, Prodr. de 



Paleont., p. 48 Niagara Gr. 

 STYLASTREA, Lonsdale, 1845, Geo. and Pal. 

 of Russia, and Ural Mts., p. 621. [Ety. 

 sly j os, pillar ; axter, star.] Composite, 

 large; corallites prismatic; easily sepa- 

 rable ; walls thick, striated longitudi- 

 nally, and wrinkled transversely ; within 

 the walls there is a narrow, vesicular, 

 perithecal zone, and within it alamellif- 

 erous area; septa numerous, not reach- 

 ing the center ; tabulae abundant. Type 



5. inconferta. 



anna, Whitfield, 1882, Ann. N. Y. Acad. 



Sci., vol. 2, p. 199, Up. Held. Gr. 

 SYRINGOLITES, Hinde, 1879, Geo. Mag., vol. 



6, p. 244. [Ety. syrinx, pipe; lithos, 

 stone.] Composite, large with basal 

 epitheca; corallites polygonal, thin- 



