52 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Schizorthosecos Canu and Bassler, 1917. Family Orbituliporidae. 



Schizostoma Canu, 1907, (not Lea 1842). See Schizostomella. 



Schizostomella Canu and Bassler, 1927. Family Adeonidae. 



Schizotheca Hincks, 1877. Family Reteporidae. 



Sclerodomus Levinsen, 1909. Family Sclerodomidae. 



Scorpiodina Jullien, 1886. Family Costulae. Requires further study. 



Scruparia Oken, 1815. Family Scrupariidae. 



Scrupocellaria Van Beneden, 1845. Family Scrupocellariidae. 



Scuticella Levinsen, 1909. Family Catenicellidae. 



Scutularia Busk, 1860. Only species S. prima Busk (nomen nudum). 



Selbia Gray, 1843. Synonym of Caberea. 



Selenaria Busk, 1854. Family Opesiulidae. 



Selenariopsis Maplestone, 1912. Family Opesiulidae. 



Semicelleporaria D'Orbigny, 1852. Bry. Cret., p. 420. First species, Cellepora 



cucullina Michelin. Fossil incompletely figured and never rediscovered. 

 Semieschara D'Orbigny, 1852. Bry. Cret., p. 364. Genotype, »S. flabellata 



D'Orbigny, 1852. Idem, p. 367, pi. 708, figs. 1-4. Used for zoarial forms. 

 Semiescharella D'Orbigny, 1852. Bry. Cret., p. 462. Type, S. flexuosa D'Or- 

 bigny, 1852. Idem, p. 462. Type not figured. Waters, 1905, recognized 



it as Eschara pallasiana Moll, 1803. 

 Semiescharellina D'Orbigny, 1852. Bry. Cret., p. 449. Type. S. mumia D'Or- 

 bigny, 1852. Idem, p. 450, pi. 714, figs. 17-20. Type lost. Genus not 



recognized. 

 Semiescharinella D'Orbigny, 1852. Bry. Cret., p. 427. Type, »S. complanata 



D'Orbigny, 1852, Idem, p. 427, pi. 714, figs. 1-4. The figure and specimens 



do not correspond. The name had best be dropped. 

 Semiescharipora D'Orbigny, 1852. Bry. Cret., p. 479. Lang, 1917 has chosen 



S. complanata D'Orbigny, 1852, p. 484, pi. 718, figs. 17-20, as the type. 



This is an uncertain species and the generic name should be dropped 



Cretaceous. 

 Semiflustra D'Orbigny, 1852. Bry. Cret., p. 326. First species, Flustra bom- 



bycina Solander, 1787, not recognized. The second species (S. frondiculosa) 



has never been figured. The third is Flustra carbasea Ellis and Solander. 



1786 Genus may therefore be considered a synonym of Carbasea. 

 Semiflustrella D'Orbigny, 1853. Bry. Cret., p. 563. First species, S. rhom- 



boidalis D'Orbigny, 1852. Idem, p. 564, pi. 730, figs. 5-8, Cretaceous. 

 Semiflustrina D'Orbigny, 1853. Bry. Cret., p. 576. First species, S. monilifera 



D'Orbigny, 1855. Idem, p. 577, pi. 732, figs. 6-9. Included in Callopora. 



Cretaceous. 

 Semihaswellia Canu and Bassler, 1917. Family Galeopsidae or Sclerodomidae. 

 Semiporina D'Orbigny, 1852. Bry. Cret., p. 439. First species, S. elegans 



D'Orbigny, 1852. Idem, p. 440, described but not figured. Second species, 



Vaginopora fissurella Reuss, 1848. Foss. Polyp, du Wiener, pi. 9, fig. 5. 



Miocene of Austria, not rediscovered by Manzoni. 

 Sertella Jullien, 1903. Subgenus of Retepora. 

 Setosella Hincks, 1877. Family Sctosellidae. 

 Setosellina Calvet, 1906. Family llincksinidae. 

 Siniopelta Levinsen, 1909. Synonym of Coslazzia. 

 Siphonella Hagenow, 1851. Bry Maastricht Kreide, p. 83. First species, 



S. cylindrica Hagenow, 1851. Idem, p. 84, pi. 6, figs. 5. Cretaceous. 



Incompletely known. 

 Siphonicytara Busk, 1884. Family Tubucellariidae. 

 Siphonoporella Hincks, 1S80. Family Steganoporellidae. 

 Smittia Hincks, 1880, preoccupied. See Smitlina. 



