116 w. ARCHER. 
of having the spindles im them (as does the finest branch) 
but on them, even when doubtless they are upon its upper 
or lower side, in relation to the observer. ‘They are given 
off from all parts, even from the hinder portion of the mass 
still within the envelope, and it was not unfrequent to see a 
few spindles travelling from the margin of the body-mass to 
the wall. Further, it used not to be unfrequent to see in a 
well-stretched-out example that the granules remaining be- 
hind embedded in the mass, still in the head-quarters, showed 
more or less of a reticulated arrangement in rows, as if due to 
the presence of some of the filiform tracks permeating the inte- 
rior of the unissued mass (Pl. VI). Still my impression would 
be that these remarkable linear tracks are comparable rather 
to pseudopodia, that is, that they are sarcode prolongations 
evolved pro tempore, and that there does not pre-exist a store 
of them, as it were, coiled up inside waiting the occasion ; on 
“squeezing ” one of these no trace of them is seen in the 
mass. Unlike the axis of the pseudopodia of Actinospheerium, 
I have not seen that they penetrate downwards into the por- 
tion of the mass whence they emanate, and hence one of the 
most singular puzzles is that the little globular body about to 
travel, which without doubt is distinctly in the general mass, 
when it passes to the base of the filamentary track, ascends 
it, becomes fusiform, and now it appears on it. 
I have repeatedly tried in a variety of ways, by reagents, 
&c., to make out any structure of the nature of a nucleus in 
this organism, but in this I have failed. I could neither find 
a nucleus (as in Ameba, Pamphagus, Plagiophrys, Diaphoro- 
podon, &c.) imbedded in the general mass, nor in the spin- 
dles themselves. ‘The general mass is made up of the struc- 
tures alluded to, and the spindles appear only as bluish 
plastic and quite homogeneous bodies, both as described. 
Foreign incepted bodies, generally, if not always, alge, 
were not infrequent. Sometimes one can see through even 
a densely filled and thickly enveloped and hermetically 
closed-in example the “ digested’ and defunct remains of 
perhaps a Cosmarium or Euastrum, &c., or an Oocystis or some 
such organism. ‘The large example figured (Pl. VI) shows 
a brown and dead Cosmarium cucurbita, in another place an 
Oocystis Naegelii, equally brown and dead (but the character- 
istic arrangement of the endochrome not wholly lost), whilst 
next the extremity has been incepted an as yet scarcely 
altered example of a new and minute Spirotenia.1. Around 
* Spirotenia gracillima (n. s. mibi), very minute, linear, extremely 
slender, very slightly tapering, apices blunt, spiral turns very numerous; a 
