216 



INDEX AND GLOSSARY. 



Walking, 66. 



Warm-blooded animals, 96. 



Water-tubes of aquatic animals, 97. 



Whale, fans of, 80. 



Whales, mode of swimming, 70. 



White-fish, development of, 115. 



Worms, eye of, 29. 



Zoology, its sphere, 1. 



Zoophytes, animals of a very low 



type, mostly fixed to the ground 



of a plant-like form. 



