TABLE OF CONTE?s'TS. 



CHAPTER I. 



Historical Summary. 



PAGE 



First Period . 

 Second Period 



Third Period 

 Fourth Period 



PAGE 

 I 



7 

 9 



CHAPTER II. 

 Op the Rhizopoda generally; their Organization and Physiological History: 



THEIR distribution INTO SUBORDINATE GrOUPS 



Order RADIOLARIA 

 Actinophryna 

 acanthometrina 

 polycystina 

 Thalassicollina 



Reproduction of Rhizopoda 



12 

 23 



23 

 28 

 28 

 22 

 30 

 32 



CHAPTER III. 

 Of THE Foraminifera generally ; their Chief Types of Structure and Modes of Growth, 



AND THE PRINCIP: 



Texture of the shell 

 Mode of increase 

 Intermediate skeleton 

 Canal-system 

 Separation of segments 



Genus I. Lieberkuhnia 



CHAPTER IV. 



Of the Family Gromida . 



C3 Genus II. Gromia 



Genus III. Lar/ynis 



65 



63 

 64 



CHAPTER V. 



