LIST OF THE ILLUSTEATIONS. 



Page 



Plate I. Illustration of the Hydrae, or Fresh- water Polypes . .114 



II. Monads and Stentors . . . . . . .116 



Vibrio. Gonium. Chlamidomonas. Monas termo. 

 Volvox globator. Stentor. 



III. The Vorticellae, or Bell-shaped Animalcules . . .118 



IV. The Limnias, or Water-Nymph 120 



V. The Mehcerta, or Honey Floscularia . . . .122 



VI. The Floscularia, or Flower-shaped Animalcule . . .124 



VII, The Floscularia ornata, or Elegant Floscularia . . . 126 



VIII. The Floscularia proboscidea, or Horned Floscularia . . 128 



IX. The Stephanoceros, or Crowned Animalcule . . . 130 



X. The Stephanoceros Ehrenbergi ; shewing the development 



the ova 132 



XI. Development of the young Stephanoceros . . . .134 

 XII. The Rotifer, or Wheel-animalcule ; and the Brachionus, or 



Spine-bearing Animalcule 136 



LIGNOGRAPHS. 



1. Rotifer vulgaris; the upper part of the body, and the wheels 



or rotators, highly magnified 35 



2. A single Annulated Vorticella, (Vorticella convallaria), highly 



magnified 47 



