LIST OF PAPERS QUOTED. 71 



VOIGT, '02. Einige Ergebnisse aus den Untersuchungen ost- 

 holsteinischer Seen. Max Voigt. Forschungsber. aus 

 der Biolog. Station zu Plan, pp. 47-61. 



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

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

 Soc., Vol. XVT1, pp. 255-260. 



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

 in Surface Waters. G. C. Wnipple. 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. 



