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1861 Xotes and Corrections on the Organization of Infusoria. Annals and 



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1854 Ueber Actinophryns eichhornii. Miiller's Archiv fur Anatomie, Physio- 

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1922 New Apparatus for the Dissection and Injection of Living Cells. Anat. 



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 Doflein, F. 



. 1911 Lehrbuch der Protozoenkunde. 

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1838 Die Infusions Thierchen als vollkommene Organismen. Leipzig: Voss., 



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 Ehrmann, P. 



1894 Ueber die kontractilen Vacuolen der Infusorien. Sitzungsberichte der 



naturforschende Gesellschaft zu Leipzig. Bd. 21, S. 80-102. 

 Flather, M. D. 



1919 The Influence of the Glandular Extracts upon the Contractile Vacuoles 



of Paramecium caudatum. Biological Bulletin, Vol. 37, pp. 22-39. 

 Fosse, R. 



1913 Sur 1'identification de 1'uree et sa precipitation de solution extrement 



diluees. Comptes Rendus, t. 137, pp. 948-957. 

 Griffiths, A. B. 



1888 A Method of Demonstrating the Presence of Uric Acid in the Contractile 

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 Haeckel, E. H. 



See Kent, 1880. A Manual of the Infusoria. London. 472 pp. 

 Hartog, M. M. 



1888 Preliminary Notes on the Functions and Homologies of the Contractile 

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 Howland, Ruth B. 



1924 On Excretion of Nitrogenous Waste as a Function of the Contractile 



Vacuole. Journal of Experimental Zoology, Vol. 40, pp. 231-250. 

 Jennings, H. S. 



1904 A Method of Demonstrating the External Discharge of the Contractile 



Vacuole. Zoologische Anzeiger, Bd. 27, S. 656-658. 

 Khainsky, A. 



1910 Zur Morphologic und Physiologic einiger Infusorien (Paramecizim cau- 

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Ueber einiger neu entdekte Infusorien und liber contractilen Blasen bei den 

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