CONTENTS XI 



Systematic descriptions — Continued. 



Order Cyclostomata Busk — Continued. 

 Division Inovicellata — Continued. 



Family Tuhuliporidae Johnston, 1838 — Continued. Page 



Genus Platonea Canu and Bassler, 1920 548 



Genus Mesonea Canu and Bassler, 1920 549 



Family Horneridae Gregory, 1899 550 



Genus Hornera Lamouroux, 1821 550 



Family Ascosoeciidae Canu, 1919 552 



Genus Polyascosoecia Canu and Bassler, 1920 552 



Genus Crisina D'Orbigny, 1850 553 



Family Lichenoporidae Smitt, 1866 556 



Genus Lichenopora DeFrance, 1823 556 



Genus Trochiliopora Gregory, 1909 563 



Family Tretocycloeciidae Canu, 1919 564 



Genus Tretocycloecia Canu, 1919 564 



Index 663 



