T ?3 



THE 



NATURAL HISTORY 



OF 



ANIMALCULES: 



CONTAINING 



DESCRIPTIONS OF ALL THE KNOWN SPECIES OF 

 INFUSORIA; 



WITH 



INSTRUCTIONS FOR PROCURING AND VIEWING THEM, 

 &-C. ^c. ^c. 



[LLUSTRATED BY UPWARDS OF THREE HUNDRED MAGNIFIED FIGURES 

 ON STEEL. 



By ANDREW PRITCHARD, Esq. 



AUTHOR OF THE " MICROSCOPIC CABINET." 



LONDON: 

 WHITTAKER AND CO. AVE-MARIA-LANE. 



1834 



