260 
number (often very great) of spherical cells, with dense granular 
contents enclosed in a special wall, and each with a nucleus and 
nucleolus, these cells forming a subglobose internal cluster ; 
they, however, sometimes are more or less scattered, and even 
separated into minor groups. These central cells are pi'etty 
much of equal size, though occasionally a few somewhat smaller 
or larger than the average — about 1-1700 of an inch — present 
themselves. The nucleus appears to be usually, if not always, 
excentric, with an excentric nucleolus; but the nucleus is 
sometimes not evident, most probably owing either to the 
cell-contents being too thick and dense to admit of its being 
seen through, or to its being turned away from that side which 
is towards the observer. The nucleus appears of a light 
colour, and with a very delicate boundary, and the nucleolus 
shows itself as a somewhat darker dot therein posed some- 
what to one side. The general cell-contents are of a granular 
appearance, and of a greyish-blue tint, very like that of the 
so-called ‘nucleus’ in Amoeba, Difflugia, &c. &c. The 
cell-wall is thin and sharply defined, and presenting a 
somewhat yellowish tint ; the contents not unfrequently are 
seen considerably receded from the wall, and possess a 
smooth boundary or outline. Self-division of the contents 
takes place by a complete fission into two within the outer 
wall, and often in such a stage a nucleus is to be seen in 
both parts of the so-divided mother-cell ; but I cannot say 
what becomes of the parent cell-wall upon the young cells 
attaining full form, nor whether they acquire a special cell- 
wall ere they should in any way become denuded of the 
mother-cell-wall. The sarcode mass enveloping the cells is of 
a very great tenuity and very delicate, hence the covering- 
glass, in order to preserve so fragile an organism for due 
examination, requires to be kept from bearing too heavily 
upon it, by being let down upon a piece of thin glass, or 
some such mode of defence adopted, or by placing the dip in 
an animalcule-cage, when the amount of pressure is thus 
under control. Emanating from this delicate sarcode mass 
the pseudopodia project to a greater or less extent into the 
surrounding water ; these sometimes attain a considerable 
length, probably twice the diameter of the body or more, 
and are then fewer in number than when they are more 
shortly projected, and sometimes do not radiate in all direc- 
tions ; they are sometimes rather short, and then more 
numerous, and then usually radiate more or less copiously 
all round. They are slender and pellucid, and mostly branch 
in a more or less irregular and subarboreseent manner, 
becoming also not unfrequently mutually incorporated here 
