CHLAMYDOMYXA MONTANA, 237 
an apparent tree-like structure, the appearance in both cases 
being illusive. A gentle to-and-fro swinging movement of an 
outstretched thread is sometimes seen. Such movement may 
be due to currents in the surrounding liquid. 
As to the further interpretation of the nature of the threads 
I will say more below. 
The Oat-shaped Corpuscles.—Travelling upon the threads and 
closely packed against one another in those parts of the hyaline 
border-substance which are, so to speak, not unravelled, are 
very numerous oat-shaped or fusiform corpuscles. They are 
represented in figs. 1—4, and one is drawn on a greatly 
enlarged scale in fig. 5. These corpuscles are described by 
Archer as leading characteristics of his C. labyrinthuloides, 
and are compared by him with the nucleated spindle-shaped 
bodies which travel upon the threads of the Labyrinthula of 
Cienkowski. In Archer’s species of Chlamydomyxa, however, 
these corpuscles were homogeneous, showing neither an envelope 
of protoplasm nor a central nucieus. The same is true of the 
fusiform corpuscles of C. montana. They are structureless. 
It is important to note that they are very much smaller in 
C.montanathaninC.labyrinthuloides. Archer states that 
in the latter they are ;,4,5 inch long and half as broad, whereas 
0 
I find that in C. montana they are not more than the ;,1 
12000 
ofan inch or two microns in length. Nevertheless they are 
perfectly distinct and uniform both in size and shape. I found 
that they were stained more strongly than the threads by the 
addition of a solution of iodine ; and since neither by this nor by 
any other method could I detect anything indicating a central 
nucleus or nuclei in Chlamydomyxa (Archer failed equally), I 
think that these oat-shaped corpusclesin both species of Chlamy- 
domyxa should be regarded as nuclei, the particles of a frag- 
mented scattered nucleus. In encysted specimens of Chlamy- 
domyxa montana I entirely failed (either by direct exami- 
nation or by use of reagents) to detect any trace of these oat- 
shaped corpuscles. 
Movement of the Oat-shaped Corpuscles—The movement of 
the oat-shaped corpuscles is the most interesting and character- 
