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tions that could be called pseudopodia. It occurs of very varied 
dimensions, from a minute size even up to a diameter, spread upon 
a slide, of as much as one fourth of an inch. Some of those even 
now under view covered a space of ;1,th or 1th of an inch across, as 
they lay spread for observation on the slide. The more minute 
examples maintained more or less of an oval figure, and progressed 
along (in a manner similar to an Ameba limax or an Ameba 
villosa) with no inconsiderable amount of locomotive power. The 
larger examples, forming a little whitish patch on a slide, presented 
an indefinitely lobed figure, with only slow and very gradual changes 
of outline. Such specimens showed a considerable tendency to open 
up into holes of varying sizes, several of which could be sometimes 
seen in a single individual. All the examples were characterised by 
a thick and hyaline, and seemingly comparatively unyielding and, so 
to say, somewhat tough “ ectosare,’”’ this very smoothly bounded, 
never falling into folds or inequalities, but occasionally spreading in 
shallow waves, the “ endosare” keeping equidistant, thus maintaining 
a sharply bounded, very hyaline, narrow rim-like border to the body- 
mass, as well all round the exterior as around the boundaries of the 
holes or apertures formed through and through the body. The 
endosare was of a nature seemingly different from that of a 
typical Amceba, in that it presented an alveolar or quasi-cellular 
appearance quite comparable to that of detinospheriwm Eichhorni, 
but xo trace of “ cortical” or “‘ central” strata or regions. In all 
this, however, there may not be much to distinguish this from an 
Ameceba-form ; however, Mr. Archer, on more than one previous 
occasion on which he had seen it, had looked in vain for the so-called 
“nucleus,’’ which should appertain to a typical Amceba. The 
present examples proved, he regretted to say, that he had previously 
given this form a far too hasty examination, for here were multitudes 
of nuclei. As is well known, in an ordinary Ameba proper there is 
but a single ‘nucleus,’ and the examples now shown were sufficient 
to arouse attention. The nuclei here were far more minute and dif- 
ferent in appearance from that of an Ameeba. In a word, they formed 
little round bodies lodged in the angles between the areolw quite like 
those of Actinospherium Hichhornii, and like them they compara- 
tively quickly take a deep red colour under treatment of Beale’s Car- 
mine Solution; but, as was mentioned, the body showed no cortical 
margin. Numerous and varied objects were here and there imbedded 
in the body-mass incepted as food. Now, if this form should turn out 
a really distinct type, that may be said to bear (to a certain extent) 
a relationship to Ameeba similar to that of Actinospherium 
Eichhornit to Actinophrys sol. It is well known, however, that 
Actinospherium Eichhornii possesses the faculty or tendency to 
become fused several into one, and such examples are sometimes met 
with ; indeed, Mr. Archer had just seen five of different sizes partially 
fused into a common mass, each, however, maintaining to a certain 
extent an individuality, and the external borders of the so-united exam- 
ples keeping their rounded outline. Mr. Archer had brought down 
specimens showing this phenomenon, but time did not allow him to 
