CONTENTS. 
CHAPTER I. 
PAGE 
LIFE AND HER CHILDREN ... i 
CHAPTER II. 
LIFE'S SIMPLEST CHILDREN, HOW THEY LIVE, AND MOVE, 
AND BUILD 14 
CHAPTER III. 
How SPONGES LIVE 33 
CHAPTER IV. 
THE LASSO-THROWERS OF THE PONDS AND OCEANS . . 50 
CHAPTER V. 
How STAR-FISH WALK AND SEA-URCHINS GROW . . 77 
CHAPTER VI. 
THE MANTLE-COVERED ANIMALS, AND HOW THEY LIVE 
WITH HEADS AND WITHOUT THEM . . . .103 
CHAPTER VII. 
THE OUTCASTS OF ANIMAL LIFE, AND THE ELASTIC-RINGED 
ANIMALS BY SEA AND BY LAND 135 
