LIST OF PAPERS QUOTED. 71 



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 holsteinischer Seen. Max Voigt. Forschungsber. aus 

 der Biolog. Station zu Plon. pp. 47-61. 



Ward, '95. A New Method for the Quantitative Determina- 

 tion of Plankton Hauls. H. B. Ward. Proa Amer. Mic. 

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Whipple, '94. Some Observations on the Growth of Diatoms 

 in Surface Waters. G. O. Whipple. Technology Quar- 

 terly, Vol. VII, pp. 214-231. 



Yung, '99. Des Variations Quantitatives du Plankton dans 

 le Lac Leman. E. Yung. Arch. Sci. Phys. et Nat 

 Geneve. T. VIII, p. 344-364. 



