CHLAMYDOMYXA LABYRINTHULOIDES. 125 
not become specially encysted, but the whole of them, along 
with the other granular structures in common, might be only 
of secondary importance ; more cogent, indeed, is it perhaps 
that they have not been seen to divide, but after all it isa 
probable way of their increase. 
The remaining objections seem rather to relate to questions 
of habit, or might be considered in themselves as touching 
upon points rather of mere ‘‘ specific’ signification than of 
higher import. Cienkowski’s forms might yet prove to be 
parasitic ; they at least grow upon and surround the adjacent 
algse. Cienkowski’s forms took some twenty-four hours on 
a “slide ”’ to grow up into a “ tree” lke that shown in his 
figures ; the present form has often presented a spectacle like 
that shown in Pl. VI in less than as many minutes. 
If the spindles in my form were nucleated, i.e. if they 
represented “ cells,’ not merely plastic, homogeneous, little 
masses, the present organism would seem to be necessarily rele- 
gated to the Labyrinthulez, apart from the other points of 
difference. 
The “filamentary tracks” in Cienkowski’s forms and in 
the present organism seem wonderfully to resemble each 
other, so much so that, whatever be their mode of evolution, 
it is probable this is alike in all. As has been seen, Cienkow- 
ski ascribes the origin of the filamentary tracks to the spin- 
dles themselves, in other words, a spindle must exist before 
a track ; the former must first exude or give off the filamen- 
tary substance (“ faserige Substanz”’), then pass along (?), or 
in (¢), or between (?), the threads so produced, but which the 
author leaves an open question. But this does not, seem- 
ingly, quite coincide with his description of the basic sub- 
stance, a ‘“‘zarte, feimnkdrnige Rinden-Substanz,’” often 
forming at the periphery a thin enveloping layer, where 
again its substance is spoken of as either “ganz hyalin, einfér- 
mig” or as showing a“ sehr feine faserige Structur,”’ and where 
it has the power to give off branches, of a glassy appearance, 
gradually tapering off; these may be of a uniform appear- 
ance, or show a very fine fibrous (faserig) structure, and at 
the margin sometimes running off into very thin, scarcely 
perceptible rays, sometimes fringe-like, at others tufted and 
all this seemingly without the direct presence of any of the 
spindles. These fine linear threads seem to be nothing more 
nor less than the “ tracks,” as yet very short. In one form 
the tracks, if I mistake not, are given off independently of 
the spindles, but they are no sooner there than spindles are 
seen thereon (or therein?). As I have mentioned as reyards 
my form, and as will be seen in the figure, a more or less 
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