NORTH AMERICAN EARLY TERTIARY BRYOZOA. 817 



FIG. 269. Zoarial forms of Liclienopora. 



A, a-e. Discocavca D'Orbigny, 1853. Genotype. Discoeavea irrcgularis D'Orbigiiy, 1853. 

 Various views of Discocacea elegana Simonowitch, 1871. (After Sinionowitch.) 



B, a-c. Liclienopora Defrance, 1823. Genotype Liclienopora turbinata Defrance, 1823. 

 Liclienopora steUata Goldfuss, 1827. (After Gregory, 1909.) o. Portion of frontal ; 6. tangential 

 thin section, X 20: c, vertical thin section, X 13*. 



C, Or-c. Pyricavea D'Orbigny, 1853. Views of the genotype Pyricavea franqana D'Orbigny, 

 1853. (After D'Orbigny.) 



D, a-c. Bimulticavea D'Orbigny, 1853. Views of the genotype Bimulticavea variabilis D'Or- 

 bigny, 1853. (After D'Orbigny.) 



E, a-<7. Xciiiiiiiiilticarca D'Orbigny, 1853. Semimulticavea landrioti D'Orbigny, 1853. (After 

 D'Orbigny. ) 



F, o-(f. Radiopora D'Orbigny, 1849. Zoarium, natural size and enlarged, of the genotype 

 Radiftpora mendonensis D'Orbigny, 1853. (After D'Orbigny.) c, d,. longitudinal and transverse 

 sections of Radiopora neocomiensis D'Orbigny, 1850. (After Gregory, 1909.) 



G, a-f. Tholopora Gregory. 1909. (Domopora D'Orbigny. 1849.) G. 6, c, d. Zoarium natural 

 size, the extremity enlarged and a longitudinal thin section of the genotype Domopora clavata 

 Goldfuss. 1827. G, , e, f. Similar views of Domopora rirgulosa Gregory, 1909. (After Sirnono- 

 witcb, 1871.) 



55899 20 Bull. 106 52 



