314 The Entomostraca of Mid-Lothian. [Sess. 
death through having been kept too long in unsuitable condi- 
tions, and after being placed in formalin they were still 
beautifully displayed, with the antennas fully extended ; 
whereas all those that we have killed with formalin curl up, 
and the antennas droop towards the body and lose their fine 
outlines. Rather to our surprise we found that the former 
were much the easier to mount. They appear to be little 
more than skeleton shells, into which the G.W.A. found ready 
admission ; while in the other case it did not so easily replace 
the juices of the body. 
One or two of the Cladocera were very troublesome to draw. 
We generally put our specimens in a few drops of water on the 
slide, and place a cover-slip gently on the top. But if a slip 
is put on a Chydorus, for instance, no matter how carefully, the 
pliable shell becomes more or less distorted; whereas, if no 
slip is put on, the creature turns round and round on the slide 
until it is tired, when it is likely enough that the water has 
evaporated, and the outlines therefore become obscured. The 
live-box is of some assistance, but not much; and our best 
drawings of Chydorus were made from specimens which we left 
uncovered on a slide, and watched patiently until they lay 
still. All our drawings are made with the help of the camera 
lucida. 
Localities. 
Altogether about forty localities in Mid-Lothian were visited 
by us. 
The pond to which we have done most justice is the Elf 
Loch, on the Braids. We obtained from it twenty-three 
species, but this by no means exhausts its possibilities, as 
Mr Scott and Mr Lindsay obtained from it thirty-two species 
during their investigations in 1896,’97, and 98. We visited 
the loch in all seasons: once we went there on a winter after- 
noon when the hills were covered with snow, and on reaching 
the pond we found it frozen two inches thick. We broke a 
hole in the ice, and having fished as well as circumstances 
permitted we were well rewarded by finding in our catch some 
specimens of Ilyocryptus sordidus, a bottom species, which we 
had not previously obtained. The only species we have added 
to Mr Scott’s list for the Elf Loch is Cypris gibba. We 
