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no such extraneous assistance ; its inherent nature admits of 
a test sufficiently strong being secreted in its own structural 
development. ‘There are, then, various “‘ sarcode” bodies, 
capable each of making such choice from a common stock of 
materials; each capable of applying those materials in its 
own way; whilst to me these and such like specialities seem 
to be bound up with a considerable amount of constancy in 
outward figure, and a certain amount of constancy, also, in 
dimensions, which are more than accidental. Again, there 
is “sarcode” capable of secreting solid “skeletons” of 
various types and forms, and side by side with it other ‘ sar- 
code” not capable of this, the external circumstances being 
alike. There is “sarcode” which makes its *‘ skeleton” a 
hollow globular fenestrate structure, finally external to its 
own living mass, and, side by side with it, other “‘ sarcode ” 
which makes its skeleton separate portions (variously figured 
“‘ spicules”), deposited in the external region of its living 
mass; and yet other “‘sarcode” hard by, which produces its 
solid parts more deeply immersed in its living mass, and in 
all the external circumstances being alike. ‘There is “ sar- 
code”? always colourless, or nearly so— sarcode” imbued 
with diverse variations of hue—“ sarcode”’ bearing certain 
pigment granules—each speciality bound up with indivi- 
duality of form, and in all the external circumstances being 
alike. There is ‘‘ sarcode ” slow in projecting and retracting 
the characteristic ‘ pseudopodia,” and ‘ sarcode ” which can 
send forth and withdraw its “ pseudopodia ” with compara- 
tive rapidity and energy; there is ‘‘ sarcode” which can send 
out comparatively very slender and long, even delicately fili- 
form pseudopodia, and other “ sarcode ” which cannot project 
such prolongations, except as little more than, as it were, 
narrow lobes of its own body-mass, and produced only to a 
comparatively limited extent—such specialities, in various 
degrees, seemingly bound up with certain outward figures, 
and at the same time the external circumstances being alike. 
There is “sarcode” seemingly quite, or nearly all but, 
rigidly abstinent, with Jots of food around, and side by 
side “ sarcode”’ gluttonous to satiety; ‘‘ sarcode ” in whose 
substance not yet any crude food has been seen, and “ sar- 
code” so hungry that at least one form of rhizopod exists, 
whose seemingly highest aspiration and even ultimate aim in 
existence would appear to be to die of sheer repletion— 
these specialities, in various degrees, likewise seemingly 
bound up with certain outward figures, and at same time the 
external circumstances being alike. 
In thus cursorily drawing attention to some of the idiosyn- 
