NOTICE. 



The Author's former "Work, entitled '' Tlie jS'atiiral History of 

 Animalcules"' being out of Print, the following pages (which 

 constitute Part I. of A History of Infusoria) are offered to the 

 public in the hope that they, together with the engravings, 

 may extend and advance the study of this subject, by presenting 

 a general outline of the History of Animalcules to those per- 

 sons who do not feel disposed to enter into the minutiae con- 

 tained in the body of the larger work. 



