IV BULLETIN" 16 5, UNITED STATES NATIONAL MUSEUM 



Order Cheilostomata — Continued 



Suborder Ascophora — Continued Page 



Family Pelmatoporidae 53 



Genus Rhiniopora 53 



Genus Kelesloma 55 



Genus Tricephalopora 56 



Genus Polycephalopora 59 



Genus Anornithopora 60 



Genus Hesperopora 61 



Genus Stichocados 62 



Genus Diacanthopora 65 



Family Hippothoidae 71 



Genus Hippothoa 71 



Genus Dacryopora 71 



Diplotresis, new genus 72 



Family Acroporidae 73 



Genus Beisselina 73 



Family Escharellidae 79 



Subfamily Peristomellae 79 



Genus Exochella 79 



Family Phylactellidae 80 



Genus Perigastrella 80 



Family Hippopodinidae 81 



Genus Hippaliosina 81 



Family Reteporidae 82 



Psilosecos, new genus 82 



Family Celleporidae 84 



Genus Acanthionella 84 



Genus Kleidionella 86 



Order Cyclostomata 87 



Subdivision Parallelata 87 



Family Diastoporidae 87 



Family Oncousoeciidae 88 



Family Plagioeciidae 88 



Family Diaperoeciidae 89 



Family Tubuliporidae 89 



Family Frondiporidae 90 



Family Cytisidae 90 



Subdivision Rectangulata 90 



Family Lichenoporidae 90 



Family Leiosoeciidae 90 



Doubtful species 91 



Explanation of plates 93 



Index 103 



