CONTENTS. 



PAGE 



I. PLANT- ANIMALS 1 



Epistylis, Vorticella. 

 Charchesium, Zoothamnium, &c. 



II. REVOLVING ANIMALS 10 



Conochilus volvox. 



III. THE BRICK-MAKER 18 



Melicerta ringens. 

 Melicerta tyro, &c. 



IV. TUBE-DWELLING ROTIFERS 27 



Limnias, Cephalosiphon. 

 (Ecistes, &c. 



V. CRYSTALLINE VASES AND THEIR INHABITANTS . 36 



Floscule. 

 Stephanoc&ros. 



VI. REVOLVING PLANTS 48 



Volvox globator. 



