1276 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Theca forbesii Dawson. Not recognized. 



Theca Forbesii (Sliarpe) Dawson, Canadian Nat. Geol., 5, 1860, p. 299. 

 Silurian (Arisaig): Nova Scotia. 



Theca niagarensis Grant. Not recognized. 



Theca Niagarensis Grant, Jour, and Proc. Hamilton ABSOC., 17, 1901, pp. 73, 74. 

 Niagaran: Near Hamilton, Ontario. 



THECA PARVIUSCULA Hall. See Hyolithea parviusculus. 



THECIA Edwards and Haime. Genotype: T. swindernana Goldfuss. 



Thecia Edwards and Haime, Oompt. Rend, de 1'Acad. Sci., 29, 1849, p. 263; 

 Mon. d. Polyp. FOBS. d. Terr. Pal., 1851 (Arch. du.Mus. d'Hist. Nat., 5), pp. 

 158, 306. Pictet, Traite" de Pal., 2d ed., 4, 1857, p. 447. Milne-Edwards, 

 Hist. Nat. d. Corall., 3, 1860, p. 316. Salter, Cat. Camb. Sil. Foss., 1873, 

 p. 110. Lindstrom, Ann. Mag. Nat. Hist., 4th ser., 18, 1876, p. 13. Romin- 

 ger, Geol. Surv. Michigan, 3, pt. 3, 1876, p. 66. Nicholson, Tab. Corals Pal- 

 Period, 1879, p. 236. Zittel, Handb. Pal., 1, 1879, p. 213. Roomer, Leth. 

 geog., pt. 1, Leth. Pal., 1883, p. 451. Miller, N. A. Geol. Pal., 1889, p. 207.- 

 Sardeson, Neues Jahrb. Min., Geol. Pal., Beilage-Band, 10, 1896, p. 297. 

 Lindstrom, Kongl. Sven. Vet.-Akad. Handl., 32, No. 1, 1899, p. 29. Pocta, 

 Syst. Sil. du Centre Boheme, 8, pt. 2, 1902, p. 275. Grabau and Shimer, 

 N. A. Index Fossils, 1, 1906, p. 91. 



Thecia major Rominger. 



Thecia major Rominger, Geol. Surv. Michigan, 3, pt. 2, 1876, p. 67, pi. 25, figa. 

 1, 2. Roemer, Leth. geog., pt. 1, Leth. Pal., 1883, p. 454. Hall, 12th Ann. 

 Rep. Indiana Dep. Geol. Nat. Hist., 1883, p. 253, pi. 2, fig. 6. Davis, Ken- 

 tucky Fossil Corals, Geol. Surv. Kentucky, pt. 2, 1885, pi. 34, figs. 1-3. 

 Miller, N. A. Geol. Pal., 1889, p. 207, fig. 227. Lesley, Geol. Surv. Penn- 

 sylvania, Rep. P 4, 1890, p. 1186, fig. Grabau and Shimer, N. A. Index 

 Fossils, 1, 1906, p. 91, fig. 146. 



Niagaran: Charleston, etc., Indiana; Louisville, Kentucky (Louisville); Decatur 

 County, etc., Tennessee (Brownsport) ; Drummonds Island, etc., Lake 

 Huron. 



Thecia minor Rominger. 



Thecia minor Rominger, Geol. Surv. Michigan, 3, pt. 2, 1876, p. 68, pi. 25, fig. 3. 



Davis, Kentucky Fossil Corals, Geol. Surv. Kentucky, pt. 2, 1885, pi. 34, 



figs. 4, 7. Grabau and Shimer, N. A. Index Fossils, 1, 1906, p. 91, fig. 147. 

 Thecia swindernana Roemer, Sil. Fauna West Tennessee, Breslau, 1860, p. 26, 



pi. 2, fig. 4a, b. Davis, Kentucky Fossil Corals, Geol. Surv. Kentucky, 



pt. 2, 1885, pi. 34, figs. 5, 6. 

 Niagaran: Louisville, Kentucky, and vicinity (Louisville); Decatur County, 



etc., Tennessee (Brownsport); Drummonds Island, etc., Lake Huron. 

 Observation. Considered by some authors as a synonym of T. Bwindernana. 



Thecia swindernana (Goldfuss). 



Agaricia Swindernana Goldfuss, Petref. Germ., 1, 1826, p. 109, pi. 38, figs. 3a, b. 

 Thecia Swindernana Edwards and Haime, Polyp. Foss. Terr. Pal., 1851, p. 307, 



pi. 2, figs. 4, 4b. Holtedahl, [Second Arctic Exp. "Fram," 1898-1902, No. 



32, 1914, p. 15, pi. 6, fig. 4. 

 Silurian (Wenlock, Ludlow): Europe; southwestern Ellesmereland, Arctic 



America. 

 Observation. See also Thecia minor Rominger. 



