WINGE, CYTOLOG. STUDIES IN THE PLASMODIOPHORACE^. 



Explanation of the plates (1—3). 



The microscopical figures are all made by aid of »Abbe's Zeiclien- 

 apparat». 



Where no particulars are given as to the enlargement the figures 

 are drawn with Leitz" hom. Immers. ^/iq and the comp, ocular 18 

 from Zeiss. 



Plate 1. 



Teratological features of Veronica-species, infected by Sorosphaera 

 Veronicae Schkoet., and of Callitriche vernalis, infected by Sorodiscus 

 CaUitrichis Lagerh. et Winge. Fig. 1 — 9 natural size. fig. 10 mag- 

 nified. 



Plate 2. 



Sorodiscus CaUitrichis liAGERH. et Winge. 



Fig. 11 — 39 vegetative and chromatical phase, fig. 40 — 42 spo- 

 rogonic phase of the life-cyclus. 



Fig. 11 — 30. Vegetative phase. 

 » 11. A young amoeba with four nuclei. 

 » 12 — 13. Nuclei from very small amoebae. 

 » 14 — 15. Formation of the idio- and trophochromatin. 

 » 16. Anaphase. Only the idiochromatiu is visible in this case. 

 » 17 — 18. The daughter-nuclei are formed. In fig. 18 is seen the 



peculiar membrane, sometimes connecting for a time the 



daughter-nuclei. 

 » 19 — 20. Older nuclei (with polar radiations) going to divide 



again. 



