Dublin Microscopical Club. 231 
considerably longer ‘‘ neck” than Microgromia socialis (Archer), 
Hertwig, and still more so than Microgromia mucicola, Archer, the 
little form found nidulating in the enveloping mucous of the alga 
Dimorphococcus lunatus, or more especially in the alga of similar 
habit formerly referred by Mr. Archer to Durctyospherium (but 
erroneously) and called D. constrictum. If, then, this Sarcodine 
had been seen projecting even ever so short pseudopodia of “reti- 
culose” character, its genus would be decided; but, as mentioned, 
it has never been seen to emit any. All in this way that it ever 
has shown is but aslight “ overflow ” of the sarcode from the frontal 
aperture, this projecting quantity of sarcode with a “fuzzy” or 
somewhat torn-like margin. Now this sort of margin presents 
more of the ‘‘Gromian” aspect, or that which is seen in such forms 
before pseudopodia begin to be given off at length or in quantity— 
Difflugian Rhizopods presenting, on the other hand, a smooth, sharp 
outline before and during the emission of their pseudopodia. Add 
to this the fact that when this sarcodine presents itself in a gather- 
ing, it is mostly in some numbers, showing thus a good deal of a 
gregarious tendency, though it need not be said they do not occur 
combined “socially,” like Microgromia socialis, by means of inoscu- 
lating pseudopodia, and the idea that this form may prove to belong 
to Microgromia becomes slightly strengthened. ‘‘ Conjugated” ex- 
amples, however, are not infrequent, the mouths of the tests in 
close approximation. Such an example Mr. Archer was able to 
place under the microscope, and this too showed the by no means 
infrequent circumstance that the whole combined sarcode-mass of 
the two so joined examples had become balled together into a single 
globular “‘spore-like” encysted body occupying the globose base of 
one of the tests, this possibly destined to give origin another day to 
** zoospores.” Were this form to have been seen issue linear (that is 
to say ‘‘ Euglyphan ”’) pseudopodia, it would fit into Schulze’s genus 
Platoum; but having waited on it from time to time so long, Mr. 
Archer regarded this as most unlikely. For the reasons indicated, 
therefore, he felt most inclined to relegate this puzzling little form 
to Microgronua, at least ad interim, it possibly remaining as Micro- 
gromia ambigua ; if it should stay there, the genus would consist of 
three species, all of which Mr. Archer had been the first to detect. 
Stichococcus minor, Nigeli?—Dr. EK. Perceval Wright exhibited 
examples of a chlorophyllaceous unicellular alga, identified by Dr. 
Wittrock as Stichococcus minor. He also showed examples of an 
alga forming a green coating on drowned flies, which ap- 
peared to be quite the same form as the foregoing; but, owing to the 
complete rotundate, in no way elongate figure, of the cells in both 
instances, it appeared very doubtful that either should be relegated 
to the genus Stichococcus, Nageli, at all. 
February 17, 1881. 
Alcyonaria.—Dr. E. Perceval Wright exhibited the spicules of 
two very beautiful new species of Alcyonaria from the collection 
