56 Wisconsin Academy of Sciences, Arts, and Letters. 
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matter. The strands are fine and very tough, in marked con¬ 
trast to the two preceding species. 
In the center of the strand the hypliae run very nearly 
straight only slightly twining around each other. The large 
celled hyphae are formed of very long cells so that it was only 
occasionally that I found a cross wall. The walls are very deli¬ 
cate and do not show either a pore or the lens shaped plates. 
The cytoplasm forms a peripheral network of deeply staining 
strands which are very irregular and contain a number of large 
round granules. Only one or two octahedral crystals were found 
in any of the cells. The cells contain two large nuclei which 
take a very light stain as they have apparently only a small 
amount of chromatin. The nuclear membrane is very distinct 
and clearly defines the nucleus. The nucleole is very small. 
The slender hyphae are very abundant and form the larger 
portion of the strand. They arise as lateral branches of the 
larger ones and twining among each other in a slightly oblique 
direction gradually work their way to the surface. At the sur¬ 
face they form a layer of densely packed hyphae by the inter- 
Jacing of their branches. On the outside of this layer the hyphae 
are more loosely wmven together and their walls become gradu¬ 
ally thickened to form. a. protective covering. The cells of the 
fine hyphae are long and slender in the central portion of the 
strand, becoming much shorter as they approach the surface. 
At every cross wall very large distinct convex plates are present. 
The cytoplasm forms a finely granular layer at the periphery. 
There are always two large distinct nuclei near the center of each 
cell. 
Section which pass through the main strand and the base of a 
lateral branch show r that the hyphae which form the branch do 
not arise in any very definite fashion. Hyphae from various 
parts of the central and outer layers curve in the same direction 
towards one side and unite at the surface to form a branch. In 
one case I was able to trace a hyplia which was growing on the 
other side of the strand, until it was nearly oposite the branch, 
where it curved sharply, crossed the main strand and entered the 
branch on the other side. 
