518 Wisconsin Academy of Sciences, Arts, and Letters. 



29. : Starcli Formation in Tlydrodictyon utriculatum. 



Annals of Botany 15: 619, 1901. 



30. Vaiicher: Histoire des Conferves. Geneve, 1803. 



31. Vries, H. de: Plasmolvtische studien liber die Wand der 



Vacuolen. Jahrb. f. wissen. Bot. 16: 463, 1885. 



32. V\'ebber, H. J. : Peculiar stmctnres occurring in the pollen 



tube of Zamia. Botanical Gazette 23 : 453, 1897. 



33. : The development of the Antherozoids of Zamia, 



Botanical Gazette 24 : 16, 1897. 



34. Went, F. A. F. C. : Die Entstehung der Vacuolen im 



Fortpiianzungszellen der Algen. Jahrb. f. wissen. Bot. 

 21: 299, 1890. 



35. Wilson, E. B. : On protoplasmic structure in the eggs of 



Echinoderms and some other animals. Journal of Mor- 

 phology^ 15: 1. Supplement. 



36. : The Cell in Development and Inheritance. New 



York, 1900. 



