xii CONTENTS. 



I'AGE 



VII. LIVING MATTER 57 



AmcBba. 



VIII. ANIMATED TRUMPETS, HATS, AND PURSES . . 64 



Stentors. 

 Bursars. 



IX. HYDRA 73 



X. WATER-BEARS AND ROTIFERS . . 84 



XI. COMPOSITE ANIMALS 94 



Plumatella, &c. 



XII. THE SUN ANIMALCULE 104 



Actinophrys sol, &c. 



XIII. STAR-LIKE ANIMALS 113 



Acinetons. 



XIV. SOCIAL il CROWNED HEADS " 123 



Meyalotrocha, Lacinularia. 



XV. A SUBAQUEOUS CITY 139 



Sponges. 



XVI. NATURE'S JEWELS 157 



Diatom*. 



