AN INTRODUCTION TO THE MORPHOLOGY AND 

 CLASSIFICATION OF THE FORAMINIFERA 



By JOSEPH A. CUSHMAN 

 (With i6 Plates) 



CONTENTS PAGE 



Foreword 2 



Introduction 3 



General account of the foraminifera 4 



Life history 5 



Habits 6 



Structure of the test 7 



Developmental stages 7 



Variation 8 



Distribution in present oceans 8 



Geologic distribution 10 



Methods of handling 10 



Recent material 10 



Collecting 10 



Preserving 11 



Washing 1 1 



Sorting 1 1 



Selecting and mounting 12 



Fossil material 13 



Classification 14- 



Family I. Gromidae 17 



Family 2. Astrorhisidae .... 18 



Family 3. Lituolidae 25 



Family 4. Textulariidae 31 



Family 5. Lagenidae 2>7 



Family 6. Chilostomellidae 40 



Family 7. Globigerinidae 41 



Family 8. Rotaliidae 43 



Family 9. Nummtilitidae 48 



Family 10. Miliolidae 51 



Bibliography 56 



Explanation of plates 62 



Smithsonian Miscellaneous Collections, Vol. 77, No. 4 



