PROCXEDINGS OF SOCIETIES. 235 
Goniwm pectorale in having the constituent cells, but four only, 
not sixteen; also in the form of the cells, which were much 
drawn out towards one side of the little tablet, that, indeed, 
whence the cilia originated ; seen laterally, they showed an oyate 
outline. Self-division of the cells took place much as in G. 
pectorale, but stopping, of course, when divided into four ; and here 
a possible further distinction presented itself in that—whilst in CG. 
pectorale the self-division is successional, here it appears to be 
simultaneous. ‘This, however, is a question, so far as it may bear, 
open to further examination ; at least, Mr. Archer had not found 
any constituent cells of these little tablets otherwise than un- 
divided or divided into four; he had not seen them halved or 
divided into two daughter-cells only. Mr. Archer showed side 
by side a moving tablet and a vegetating one, showing the four 
daughter-cells, emanating from a single gonidium. 
Dr. Frazer showed some nicely prepared sections of Galway 
serpentine, and exhibited the structure lately so much debated, 
and referred to the Foraminifera— Hézoon Canadense. 
Dr. Moore showed a Tabellaria taken by him at Lough 
Luggela: this Mr..O’Meara promised to identify. 
Dr. Barker exhibited specimens of a remarkable little organism 
which seemed to appertain to Astasiza. This was very minute, 
fusiform, exceedingly slender, twenty or thirty times longer than 
broad, extremities acute, colour dull green, containing scattered 
dark granules, exhibiting under a high power a molecular 
movement: at about a quarter the length of the whole organism 
from one extremity, there was a narrow linear, about twice or 
thrice as long as broad, garnet-coloured, red dot (“ eye-speck’”’), 
which seemed somewhat to project from the general outline of 
the body. There was no flagellum evident, yet this singular 
little organism was endowed with active powers of locomotion ; it 
would swim with great rapidity in a given direction for some 
time, suddenly stop and swim back, without turning, in a direc- 
tion possibly the exactly opposite, or it would remain quiescent 
for a time, usually again starting off after a slight delay with 
greater or less rapidity. This curious production occurred in 
considerable numbers in a gathering made in one of the ponds in 
the Park, but their vivacity did not last long, and soon they 
were to be found only in a still condition. 
Mr. Archer stated that, guided by Dr. Barker, he had made a 
gathering from the pond pointed out, and had obtained even, if 
possible, a still greater quantity of this organism. He thought it 
could, for the present, be only referred to Astasizea: he had noticed 
a certain amount of flexibility in it: many were found curved 
somewhat, and retaining this form in a still state: on one occa- 
sion (he reminded Dr. Barker) that they had together seen an 
individual with one extremity somewhat prolonged into a fine 
tale-like extension, apparently inflated or capitate at the end. 
In some of the specimens which Mr. Archer had taken he had 
