HISTORY OF INFUSORIA^ 





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THE DESMIDIACE^ AND DIATOMACE^, 



BRITISH AND FOREIGN. 



BY 



ANDREW PRITCHARD, Esq., M.R.I., 



AUTHOR OF TUB 'MICROSCOPIC CABINET,' ETC. 



FOURTH EDITION. 



ENLARGED AND REVISED BY 

 J. T. AELIDOE, M.B., B.A. Lond. ; W. AECHEE, Esq. ; 

 J. EALES, M.E.C.S.L. ; W. C. WILLIAMSON, Esq., F.E.S. 

 AND THE AUTHOE. 



ILLUSTRATED BY FORTY PLATES. 



LONDON: 

 WHITTAKER AND CO., AVE MARIA LANE. 



1861. 



[ The rig Jit of translation is reserved.'] 



