146 
BATHYMETRICAL SURVEY OF 
Daplinia lacustris (large) was also common. The Cyclops was covered 
with parasites of many species, both animal and vegetable. 
The lochs which are drained by the Lunan burn form a connected 
series, all of moderate size or very small and shallow, several being 
quite stagnant and overgrown with weeds. The most important are 
Lochs of the Lowes, Drumellie, and Clunie, the last being the deepest 
of the whole chain. Volvox was present in most of the lochs. 
Loch of Craiglush. — Most of the ordinary pelagic animals were seen. 
Holopedium was abundant. Daplinia was tinged with pink, and some 
males were seen; Diaptomus was dull brown; Bosmina was small. 
Several small Algae, as Volvox, Pediastrum, Eudorina, were common, 
and several Rotifers, as Sacculus viridis and a species of Syncliccta. 
Loch of the Lowes. — The plankton resembled that of Loch Craiglush, 
but differed in a few points. Holopedium was more numerous, Daplinia 
larger and not pink, Bythotreplies was seen, and there were fewer Algae 
and Rotifers. 
LjocIi of Butterstone. — Life was abundant, and the species were 
almost all the same as in Loch Craiglush. There was less difference 
between those two lochs than between Loch Craiglush and Loch of the 
Lowes, which are connected by a broad canal. The Daplinia was 
pink-tinged as in Loch Craiglush, and there were some males. Another 
form of Daplinia also occurred, larger, and with a purple spot on each 
valve. 
LjocIis Drumellie and Clunie. — These two lochs may be treated 
together, as they are connected by a short burn and differ little in the 
character of the plankton. The Daplinia in both had the parrot-shaped 
head which results from the elimination of the depression in the fore- 
head. Bosmina was not noted in either. Volvox was more plentiful in 
Loch Drumellie, and Leptodora was common in it and not seen in 
Loch Clunie. 
Rae Loch (or Ardblair Loch). — The most common animal was 
Notholca longispina. The Daplinia was small, the Diaptomus mostly 
immature, and Bosmina was not seen. A large bizarre-shaped In- 
fusorian with green body-contents was numerous. 
Black Loch. — The only common organisms were Diaptomus (pale 
red), Daplinia (large), P olyp)hemus , and some small Diatoms. 
White Loch and Fingask Loch. — These two lochs, which are con- 
nected by a short burn, are very similar, Daplinia (large) being much 
the most abundant animal, a few bearing ephippia and some males 
being seen. Diaptomus was hyaline and immature. Volvox was more 
plentiful in Fingask Loch. Leptodora was only seen in the White 
Loch. 
Stormont Loch. — The water of this stagnant pond was quite turbid 
and yellow in colour from the superabundance of Daplinia. The nets 
could not be drawn through the water in the usual way without getting 
