xii CONTENTS. 



PAGE 



VII. LIVING MATTER 57 



Amoeba. 



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 " CROWNED HEADS " 123 



Megalotrocha, Lacinularia. 



XV. A SUBAQUEOUS CITY . . . . .139 



Sponges. 



XVI. NATURE'S JEWELS 157 



Diatoms. 



