PROCEEDINGS OF SOCIETIES. 
Dublin Microscopical Club. 
16/7« July , 18G8. 
Mr. Archer showed fresh specimens of Chantransia clialylea 
and of Batrachospermum moniliforme, simultaneously, in order to 
draw attention to a point of agreement in structure between 
these Algrn, although of only morphological import ; thus, how- 
ever, tending to confirm the modern view of putting Chantransiacese 
and Batrachospermaceae side by side in the system. In Batracho- 
spermum, as is well known, the tips of the cells at the summits of 
the branches are each often produced into a very long filiform ap- 
pendage, terminating in a somewhat thickened bacillar extremity ; 
in this extremity seem to be condensed the cell-contents, leaving 
the filiform, stalk-like cell hyaline. Now, in Chantrausia quite a 
similar prolongation of some of the cells terminating the lateral 
branches is to be seen ; they are, however, much fewer, as not by 
any means every cell is so terminated, nor are they quite so 
slender, but otherwise they seem to agree with those of Batra- 
chospermum in structure. This character in Chantransia does 
not seem to be noticed ; and whilst Mr. Archer took the opportu- 
nity to allude to Hr. Graf zu Solms-Laubach’s paper in the ‘ Bota- 
nische Zeitung,’ describing the fructification in Batrachospermum, 
he ventured to suggest that, arguing upon the admitted similarity 
to some extent in morphological structure, further supported by 
these filiform processes, we might, perhaps, look out for a similar 
fructification in Chantransia. 
Dr. E. Perceval Wright showed specimens of the spicules of 
Steletta nux (Sel.); also spicules from a new species of Steletta 
discovered by him at the Seychelles, and described their general 
points of distinction. 
Mr. Crow exhibited a section of Coralline limestone from 
Honduras. 
Dr. John Barker desired to place on record the discovery of 
Amoeba quadrilineata (Carter) in this country. It was interest- 
ing to iiote the occurrence of a form not hitherto met with else- 
where than in the tanks of India. This is a minute form, of a 
broadly pyriform figure, not unlike A. Umax in general contour 
and mode of progression, but is readily distinguishable by the 
