114 
less elongate, blunt and conical, or slender and tapering, 
colourless or pale bluish, processes or pseudopodia (Figs. 1, 2). 
These, for a reason to be immediately explained, mostly 
emanate from a restricted region of the body-mass, and are 
very fitful, never kept extended long at a time, nor that 
often ; but further, a few still more fitful and less elongate 
pseudopodia can sometimes be projected from other parts 
(Fig. 2). The locomotive power of this form appears very 
restricted. If then our form presented no additional character, 
it would still be but an Ameeba-form, or one, owing to the 
pseudopodia being of a one-sided tendency, perhaps, ap- 
proaching Bailey’s genus, Pamphagus.’ 
But our form is more than this ; and, to continue our pro- 
gressive examination from the Ameeba-like form we haye 
reached, we find this so described body-mass is enclosed in a 
kind of mantle or coat, closely investing it ; and this is of a 
highly curious and remarkable character, which I shall now 
endeavour to describe. 
When a living example of this Rhizopod is first placed 
under examination, even though its normally orbicular figure 
be more or less distorted, this outer coat appears not only to 
surround the body closely at every part, but to form a rim- 
like exterior in complete union with it; that is, as it were, 
but a more dense and differentiated, but sharply-marked off, 
outer boundary to the body-mass, whose changes of figure it 
necessarily follows. On further examination, it is seen to 
possess a number of vertically-posed and parallel lines in its 
substance, and reaching through its thickness, giving a striate 
appearance to this rim-like investment. This appearance is 
often very striking ; but specimens occur in which it is, more 
or less, difficult to be made out; yet a little trouble, and it 
can be seen in all. Further, on the outer surface of this coat, 
there mostly occurs a dense clothing of more or less elongate 
1 In referring to the form Pamphagus mutabilis (Bailey, in ‘ American 
Journal of Science and Arts,’ 1853, vol. xv, second series, p. 1) I do not do 
so merely on a book-acquaintance with it, for, as will be seen by the minutes 
of the Dublin Microscopical Club, published in the last number of this 
journal (page 101), I have met with it in this country, beiug its first re- 
discovery, so far as I am aware, since Bailey published it at the other side 
of the Atlantic close on eighteen years ago. I venture to think there can 
be no doubt at all of its being a perfectly distinct and singular Rhizopod. 
Since the Club-minutes were sent to the printers I have seen six specimens 
from Co. Tipperary, all my previous acquaintance with it being made from 
specimens taken last and this year very sparingly in Co. Westmeath; it is 
always scanty. Should, however, good characteristic examples hereafter pre- 
sent themselves it might be worth a future effort to try and make a more 
accurate portrait of the form, than any of Bailey’s numerous but very 
rough, yet valuable, woodcuts. 
