O24 Proceedings of the Royal Physical Society. 
5. LocuH AIRDEGLAIS. 
The Lussa Water, in an upland valley near its source, 
north-west of Creach Bheinn, forms a number of expansions 
or “lochs” that extend northward for nearly two miles in a 
more or less continuous and slightly curved line. The 
southmost and largest of these expansions is called Loch 
Airdeglais or Ardglash, the northmost is called Loch 
Squabain or Scuban, and between these are two other and 
smaller lochans. Loch Airdeglais was visited on the 19th 
of March 1890, when two collections were made,—one a 
shore gathering, the other a surface tow-netting. In the 
former the following species were obtained :— 
Diaptomus gracilis, G. O. Sars. 
Cyclops serrulatus, Fischer. 
Bosmina longirostris (Miller). 
Eurycercus lamellatus (Miller), 
In the surface tow-netting only three species were obtained, 
but individuals were more plentiful than in the shore gather- 
ing. The species were as follow:— 
Diaptomus gracilis, G. O. Sars. 
Bosmina longirostris (Miiller). 
Daphnella brachyura (Liévin). 
6. THE “ MiIppLE Locn.” 
Though I have been unable to find any loch called the 
“ Middle Loch” on the Ordnance Survey map of the island 
of Mull, there is every probability that the name is applied 
to one of the two small sheets of water or expansions of the 
Lussa River, situated between the loch last described, viz., 
Loch Airdeglais and Loch Squabain, for the reason that all 
three lakes were visited on the same day, viz., on 19th 
March, while at a later date—viz., 4th July—the “ Middle 
Loch” and Loch Squabain were again visited on the same 
day. The material from the Middle Loch consisted of three 
collections—(1) a shore gathering, got on the 19th of March; 
(2) a surface and an under-surface tow-net gathering, collected 
on the 4th of July 1890. In the shore gathering made in 
March the following species were obtained :— 
