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like an aurora, in a few minutes, the tuft of pseudopodia 
seems to change, and perhaps then disappears. 
But what is more remarkable, not only do pseudopodia 
emanate from this seeming vacant part of the investing coat, 
but the body-mass occasionally can project a short blunt 
conical pseudopodium, sometimes, even simultaneously, two 
or three, from indifferent portions of its surface. Now the 
singular circumstance here is, that such a pseudopodium 
does not, as one might at first suppose, push up the outer 
coat before it, thus creating an interval or space between it 
and the body-mass, but what is more curious, urges or bores 
its way right through the outer coat and projects beyond it. 
(Fig. 2.) Such a pseudopodium appears to be more transitory 
or evanescent than those emanating from the ordinary region, 
and is usually pretty soon retracted. But, what is still more 
extraordinary than its boring its way out, is that, on being 
again withdrawn, there is not a trace apparent of the place 
through which it passed, just as if the aperture im the coat, 
which must have existed, became, as it were, completely 
healed up. 
Of course the possibility suggests itself that the outer coat 
may, in reality, be pushed up before the advancing pseudo- 
podium, and in the act become so thinned and attenuated 
as to present the appearance of a naked pseudopodium. 
But, admitting the possibility that the outer coat, which would 
thus clothe the pseudopodium, from its acquired tenuity, 
would escape detection, still I think the superficial hair-like 
processes would hardly be obliterated all along the stretched 
outer coat, and must present themselves to view, even if 
seemingly more sparsely present. But no such appearance 
is evident ; and I have endeavoured as faithfully as I can to 
repeat in Fig. 2 the appearance presented during the period 
of the extension of no less than two such temporary pseudo- 
podia in the example under view. Another interpretation 
might present itself, which is, that the fine vertical lines seen 
in the rim-like margin presented by the edge view of the 
outer coat, may represent so many really existent minute 
apertures or fine canals in its substance, which may be of a 
highly elastic nature, and that when the point of an adyanc- 
ing pseudopodium pushes against one of these, the aperture 
becomes so stretched as to give passage to the comparatively 
thick conical pseudopodium; and further, that upon its 
withdrawal, the elastic force comes again into action, and 
closes up the little fine passage to its normal dimensions. 
But I would myself be inclined to imagine the extraordinary 
characteristic of this outer coat, forming so remarkable a part 
