36 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Family ONCHOPORIDAE Levinsen, 1909 



Onchopora Busk, 1855; Calwellia W. Thompson, 1858; Oncho- 



porella Busk, 1884; Onchoporoides Ortmann, 1890; Ichthyaria Busk, 



1884. 



Family EUTHYRIDAE Levinsen, 1909 



Euthyris Hincks, 1882; Pleurotoichus Levinsen, 1909; Urceolipora 

 MacGillivray, 1880 {Calymmophora Busk, 1884); Neoeuthyris Bret- 

 nail, 1921. 



The following families are placed at the end of this division because 

 they are either of doubtful value or are incompletely studied. 



Bifaxariidae Busk, 1884, with Bifaxaria Busk, 1884; Bitectiporidae 

 MacGillivray, 1895, with Bitedipora MacGillivray, 1895; Lekytho- 

 glenidae Marsson, 1887; Lekythoglena Marsson, 1887; Nephroporidae 

 Marsson, 1887; Nephropora Marsson, 1887; Platyglenidae Marsson, 

 1887; Platyglena Marsson, 1887; and Prostomariidae MacGillivray, 

 1895, with Prostomaria MacGillivray, 1895. 



Suborder HEXAPOGONA Canu and Bassler, 1927 



Family CHAPERIIDAE Jullien, 1888 



Chaperia Jullien, 1881. 



Family MAMILLOPORIDAE Canu and Bassler, 1927 



Mamillopora Smitt, 1873; Fedora Jullien, 1882; Anoteropora, 

 Canu and Bassler, 1927; Kionidella Koschinsky, 1885; Discojius- 

 trellaria D'Orbigny, 1853; Prattia D'Archiac, 1847; Stenosipora, 

 Canu and Bassler, 1927; Ascosia Jullien, 1882. 



Family ORBITULIPORIDAE Canu and Bassler, 1923 



Orbitulipora Stoliczka, 1861; Batopora Reuss, 1867; Stichoporina 

 Stoliczka, 1861; Sphaerophora Haswell, 1881; Schizorthosecos Canu 

 and Bassler, 1917;? Bicupularia Reuss, 1864. 



Family CONESCHARELLINIDAE Levinsen, 1909 



Conescharellina D'Orbigny, 1852; Bipora Whitelegge, 1887; 

 Flabellopora D'Orbigny, 1852; Trochosodon Canu and Bassler, 1927; 

 Zeuglopora Maplestone, 1909. 



Family MYRIOZOIDAE Smitt, 1866 (part) 



Myriozoum Donati, 1750; Myriozoella Levinsen, 1909. 



Family LEKYTHOPORIDAE Levinsen, 1909 



Actisecos Canu and Bassler, 1927; Lehjthopora MacGillivray, 1882; 

 Orthoporidra, Canu and Bassler 1927; (Orihopora Waters, 1904, pre 

 occupied); Turritigera Busk, 1884; Poecilopora MacGillivray, 1886; 

 Catadysis, Canu and Bassler, 1927. 



