NORTH AMERICAN EARLY TERTIARY BRYOZOA. 283 



FIG. 81. Genera of the Costulae. 



A. MemlraiilporcUa nitida Johnston, 1S3S. Recent. 



B. Cribrilina punctata Hassel, 1841. Recent. 



C. PuclUna radiata Moll, 1803. Recent. 



D. Distansescharella jacksonica. new species, X 30. Middle Jacksouian of Georgia. 



E. Gepltyrotes nitida-punctata Smitt, 1868. Recent. 



P. Metracolposa grandis, new species, '. -0. Middle Jacksonian, Wilmington, North 

 Carolina. 



G. Corbulipora ornata MacGillivray. 1895. Miocene of Australia. 



H. Acantlwcella tubuttfcra Hincks, 1881, X 25. Recent. 



I. Cribrendoecium tenuicostvltitinn (.'anu and Bassler, 3917. Middle Jacksonian, Wilming- 

 ton, North Carolina. 



J. Arachnopusia monocerus Busk. 1880, X 25. Recent. 



K. Fiffularia figularis Johnston, 1847, X 30. Recent. 



L. Aspidclcctra melolontlia Busk. 1852, X 25. Recent. 



M. Barroisina elegantula Von Hagenmv, 1851. Cretaceous of Aachen. 



N. RcgineUa furcata Hincks, 1882. Recent. 



O. Lyrula hippocrepis Hincks, 1882. Recent. 



P. Decurtaria cornuta Beissel, 1864. Cretaceous of Aachen. 



Q. Collarina cribrosa Heller, 1867. Recent. 



R. Hurinopsis galeata Beissel, 1864. Cretaceous of Aachen. 



S. Steginopora ocellata Jullien, 1886. Cretaceous of France. 



T. Thoracopliora horrida D'Orbigny, 1852. Cretaceous of France. 



U. Ubaghsia arcifera Jullien, 1886. Cretaceous of France. 



