The. Reproduction of Ahnfeltia plicata. 17 
cell has a distinct outer limitation and a large homogeneous 
nucleolus or central body staining more or less intensely 
with hematoxylin (Heidenhain). In other cases the central 
body is differentiated into small grains which stain in- 
tensely with hematoxylin. The number of these grains, 
which must be supposed to be chromosomes, was often seen 
Fig. 15. From a nemathecium from Frederikshavn, Henn. Petersen, May 
(Alcohol, Heidenhain). End cells of nemathecial filaments showing very 
distinct chromatophores, partly paired, and nucleus. A, group of four 
end-cells; in 7 the nucleus is in the resting stage, in 4 apparently in the 
first dividing stage, in 2 the nucleus has lately divided and the two 
daughter nuclei show each four chromosomes but are still without 
nuclear membrane. Dividing stages further represented in figs. B, C (2), K. 
In fig. I the nuclear body is rod-shaped, homogeneous without nuclear 
membrane. A—G, 1015:1. H—K, 1800: 1. 
to be 4 (fig. 15). Dividing nuclei were rarely observed, most 
distinctly in the second cell from the left in fig. 15 A; two 
groups of 4 chromosomes each are here situated near one 
another in the axis of the cell, evidently arisen by division 
Vidensk.Selsk. Biol. Medd, X, 2. 2 
