774 Wisconsin Academy of Sciences, Arts , and Letters. 
EXPLANATION OF PLATE XLVII. 
Fig. 
Fit 
The drawings were made with the aid of an Abbe camera lucida, to¬ 
gether with the Zeiss 2 mm. apochromatic objective N. A. 1.30, com¬ 
bined with various compensating oculars. 
A young fructification, showing in section the protoplasmic 
reticulum (X 250). 
Cross section of a half mature cylindrical outgrowth, 
showing sections of the irregularly anastomosing and 
branching strands of peripheral protoplasm, and the 
central axis of slime (X 250). 
A small portion of a developing fructification, showing 
cross sections of four strands of peripheral protoplasm, 
imbedded in a jelly-like matrix (X 1000). 
Cleavage in a four-nucleated fragment of plasmodium. 
The nuclei appear to be entering synapsis (X 1500). 
Cleavage of two-nucleated fragment (X 1500). 
A young spore showing the nucleus in a pre-synaptic con¬ 
dition (X 1500). 
A rare condition, in which the fragment is binucleated 
with both nuclei in synapsis (X 1500). 
Young spores, each with its nucleus in synapsis (X 1500). 
Longitudinal section through the tip of an older, almost 
mature outgrowth. The protoplasm is now in a thin, 
peripheral, thimble-shaped layer, and has been entirely 
cut up into small cuboidal or oblong segments, each 
with a single, comparatively large nucleus. The slime 
in the middle appears somewhat fibrous in the prepara¬ 
tion (X 250). 
The first division which immediately follows synapsis 
(X 2250 and 1500). 
A young spore on its stalk, with the two nuclei entering 
upon the second division (X 1500). 
Tne second division following synapsis (X 1500). 
A mature spore, showing the four nuclei, stained with 
methyl green (X 1500). 
Fis 
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Fig. 
Fig. 
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Figs. 
Fig. 
8, 9. 
10 . 
Figs. 11, V. 
Fig. 
Fig. 
Fig. 
13. 
14. 
15. 
