Forel 
LXXTI. 
ON SOME MINUTE ORGANISMS FOUND IN THE SURFACE- 
WATER OF DUBLIN AND KILLINEY BAYS. By HENRY H. 
DIXON, D.Sce.; anv J. JOLY, D.Sc., F.R.S., Hon. Sec. R.D.S. 
(Puates XXVI. and XXVIII.) 
[Read Frsruary 16; Received for publication Frpruary 21 ; 
Published Aveusr 8, 1898.] 
Last summer we started tow-netting in Killiney Bay in the hopes 
of finding coccoliths, and adding something to_our knowledge of 
these peculiar bodies. 
Our first observations were made by skimming the surface-water 
with a funnel-shaped metal surface-dredge. This consisted of a 
truncated cone made of tinned iron. The wide end of the cone, 
which was trailed foremost through the water, was covered with a 
piece of brass-wire gauze, having 50 meshes to the linear inch. 
The narrow end was closed by a much finer piece of gauze, having 
350 meshes to the inch. This latter piece of gauze was carried on 
the end of a short brass tube, which fitted into the truncated end 
of the conical dredge with a bayonet joint. The whole was floated 
by means of two wooden wings, extending from the sides of the 
cone. 
In use, a constant stream of water was kept up through the 
funnel by means of the motion of the boat from which it was 
trailed, and when it was raised for examination, the water con- 
tained in the funnel was allowed to run out through the fine 
gauze. In this way, none of the smaller organisms, which had 
got into the funnel, escaped through the coarse gauze; when all 
the water had run through the gauze, the brass tube carrying it 
was taken out, and the material caught on it was washed off and 
bottled. In this manner, very concentrated samples of the smaller 
surface-organisms were obtained. ‘The larger, such as jelly-fish, 
&ce., were excluded by the coarser gauze in front. 
