571 



INDEX. 



CHAPTEK I. I-AGK 



Classification of the Animal Creation ..... 1 



CHAPTER II. 



Rhizopoda , . . . . . . . .12 



Amoeba ......... 13 



Rhizopods . . . . . . . .14 



Foraminifera . . . . . . .14 



Phosphorescence of the sea . . ' . . . . 15 



Xoctiluca miliaris . . . . . . .16 



Importance of the Rhizopods in creation ... 17 



CHAPTER III. 



Sponges .19 



History of the sponge .... .20 

 Dr. Grant's observations on a living sponge . . .21 

 Origin of flints 22 



CHAPTER IV. 



Infusoria ^Ciliated animalcules) . . . . . .24 



Remarkable mode of propagation ..... 26 



Importance in the economy of nature .... 29 



CHAPTER V. 



Hydrozoa 30 



Indefinite reproduction 



Lasso threads ........ 33 



Club hydra 34 



Tube hydra 35 



Sea wreaths 35,36 



Bell corallines 37 



Acalephse 37, 38 



