Nuclear division in Oxyrrhis marina, Duj. 219 
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EXPLANATION OF FIGURES. 
All figures were drawn at table-level with camera lucida, using Zeiss 1/12” homog. 
immers, objective, N.A. 1°25, and x 12 ocular, tube length 160 mm. 
Magnification of figures 
as reproduced is x 1900 diam. 
1, Oxyrrlis marina, nucleus showing two karyosomes. 
2. Karyosomes separated, daughter plates with blunt polar caps shown, cell division 
commenced, 
3. Central axis of mitotic figure shown between daughter plates of nucleus, elongation 
of polar caps, 
4, Central axis disappeared, karyosomes embedded in daughter plates. 
5. Alteration in form of daughter plates. 
6. Karyosomes taking up central position in nucleus again, disappearance of one of the 
polar caps, advanced stage in cell division, 
7. Parasitic spores in Oxyrrhis marina. 
