TABLE OF CONTENTS. 



Page. 



List of illustrations : xi 



General account 1 



Structure 4 



Complex tests 4 



Apertures 5 



Ornamentation 6 



Secondary canal systems 6 



Color 6 



Life history 7 



Pelagic Foraminifera 8 



Food 9 



' Collection and preservation 9 



Historical 11 



Sources of material 14 



Distribution and its factors 15 



Systematic part 18 



Order Foraminifera 18 



[Family 1 . Gromidse] 18 



Family 2. Astrorhizidse 18 



Subfamily 1. Astrorhizinae 19 



Genus Astrorhiza 19 



angulosa 20 



furcata 20 



granulosa 21 



crassatina 22 



tenuis 23 



Genus Rhabdammina 23 



abyssorum 24 



irregularis 26 



discreta 27 



linearis 28 



Genus Marsipella 29 



cylindrica 30 



Genus Bathysiphon 30 



filiformis 31 



rufus 32 



Genus Rhizammina 33 



algseformis 33 



indivisa 34 



Subfamily 2 . Saccamminina: 35 



Genus Psammosphsera 35 



fusca 35 



parva - 36 



vn 



