28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



Digenopora Maplestone, 1899. Family Catenicellidae. 



Dimetopia Bu.sk, 1852. Family Bicellariellidae. 



Dimiclausa Gregorio, 1890. Synonym of Lunularia. 



Dimorphocclla Maplestone, 1903. Family Adeonidae. 



Dimorphozoum Levinsen, 1909. Family Bicellariellidae. 



Dioptropora Marsson, 1887. Pal. Abh., vol. 4, p. 96. Type and only species D. 

 devia Marsson, 1887. Cretaceous. Genus problematic. 



Dlplodidymia Reuss, 1869. Family Calpensiidae. 



Diploeclum Kirkpatrick, 1888. Family Hippopodinidae. 



Diplopholeos Canu and Bassler, 1917. Synonym of Velumella. 



Diplopora MacGillivray, 1881. Synonym of Thairopora. 



Diploporella MacGillivray, 1885. Synonym of Thairopora. 



Diplotaxls Reuss, 1867. Preoccupied. See Biselenaria^ 



Diporula Hincks, 1879. Subgenus of Microporella.. Family Escharellidae. 



Discoescharites Roemer, 1863. Synonym of Stichoporina. 



Discofliistrella D'Orbigny, 1853. Bry. Cret., p. 561. The two species described 

 by D'Orbigny (Z). doma and D. complanata) are now referred to Cttpwiaria. 



Discoftustrellaria D'Orbigny, 1851. Family Mamilloporidae. 



Discopora Lamarck, 1836. Genotype, Cellepora verrucosa Esper, 1797. Not 

 recognized. 



DisGoporella D'Orbigny, 1851. Synonym of Cupularia. 



Dishelopora Lang. Family Disheloporidae. Cretaceous cribrimorph. 



Distansescharella D'Orbigny, 1852. Family Costulae. Doubtful genus accord- 

 ing to Waters, 1923. Referred by Lang to Andrioporidae. 



Distansescharellina D'Orbigny, 1852. Bry. Cret., p. 451. Type and only species 

 Cellepora pteropora Reuss, 1848. Miocene of Vienna Basin. D'Orbigny 

 badly interpreted the poor figure of Reuss. Synonym of Peristomclla. 



Disteginopora D'Orbigny, 1852. Bry. Cret., p. 235. Genotype, D. horrida 

 D'Orbigny, 1852. Cretaceous Costulae. Referred by Lang to Pelmato- 

 poridae. 



Distelopora Lang, 1915. Family Electrinidae. Genus of uncertain affinities. 



Ditaxipora MacGillivray, 1895. Subgenus of Strophipora. Family Cateni- 

 cellidae. 



Dittosaria Busk, 1866. Family Liriozoidae. 



Doryporella Norman. Subgenus of Callopora. 



Electra Lamouroux, 1916. Family Electrinidae. 



Electrina D'Orbigny 1851. Synonym of Electra. 



Ellipsia JuUien 1903. Synonym of Retepora. 



ElUpsopora Canu and Bassler, 1923 (subgenus of Microporella). Family 

 Escharellidae. 



Ellisina Norman, 1903. Family Alderinidae. 



Emballotheca Levinsen, 1909. Family Escharellidae. 



Emma Gray, 1843. Synonym of Menipea. 



EnnalUpora Gabb and Horn, 1862. Genotype, E. quadrangularis Gabb and 

 Horn, 1862. Jour. Acad. Nat. Sci. Phila., sec. 2, vol. 5, p. 141. Hardly 

 recognizable although possibly a species of Smittina. 



Enoplostomella Canu and Bassler, 1917. Family Stomachetosellidae. 



Entomaria Canu, 1921. Family Setosellidae. 



EpicauUdinm Hincks, 1881. Synonym of Liriozoa. 



Epistomia Fleming, 1828. Family Epistomiidae. 



Erina Canu, 1908. See Erinella. 



Erinella, new name (Erina Canu, 1908, preoccupied). Family Membranicel- 

 lariidae. 



