of the Lishery Board for Seotland. 235 
obtained, though sparingly, in gatherings from fifty and one hundred 
fathoms, but probably some of the specimens may not have been obtained 
at the depths stated, but may have entered the net when it was being 
hauled up. 
Family Leproporipz&. 
Genus Leptodora, Lilljeborg. 
Leptodora-hyalina, Lilljeborg. 
This beautiful and interesting Cladoceran was frequent in some of the 
surface tow-net gatherings, but its extreme transparency when living 
enables it usually to escape observation, except by those who are more or 
less accustomed with the method of hunting for such organisms. 
It will be observed from what has been stated in the foregoing notes 
on the results of my examination of Loch Morar, that this loch contains 
an abundant and interesting crustacean fauna which is well suited as a 
‘food supply for its numerous finny inhabitants. In this respect Loch 
Morar compares very favourably with Loch Ness, that somewhat resem- 
bles Loch Morar both in size and physical conditions. A partial examina- 
tion of Loch Ness was made on two occasious during the summer of 1890, * 
when Hntomostraca were fouud to be much less numerous than they were 
in Loch Morar in 1892. On the other hand, Loch Leven, Kinross-shire, 
which is a comparatively shallow loch, though covering a considerable 
area, and which was examined also in 1890,~* closely resembled Loch 
Morar in the abundance of its crustacean fauna. There was of course 
some difference in the proportion and in the kinds of associated species, 
but this difference is of comparatively small importance when the organisms 
are considered from the utilitarian point of view of their value as a food 
supply for fishes, as almost all the micro-crustacea are of equal importance 
in this respect. Moreover, Loch Morar, like Loch Leven, is reputed to 
be a loch where the angler is almost certain of a good and successful day’s 
fishing; but being so much out the way and so difhcult of access, 
comparatively few anglers visit Loch Morar. 
Nore on Attheyella, Brady (see page 225). 
The following information was olt.ined after the preceding notes were 
in the press :— 
G. O. Sars, in a paper entitled ‘Oversigt af de indelandske Fersk- 
‘vands-copepoder, published in Christiania by Brégger & Christie im 
1863, described among other things three species of Canthocamptus, new 
to science, viz., Canthocamptus crassus, Canthocamptus pygmexus, and 
Canthocamptus brevipes, but without illustrative figures. 
In 1883 Professor Lilljeborg exhibited a collection of crustacea at the 
International Fisheries Exhibition held that year in London. This collee- 
tion, which included the three species of Canthocamptus here referred to, 
was secured by the Rev. A. M. Norman, F.R.S., and added to his ex- 
teusive museum. 
Through the kindness of Dr Norman, my son, Mr Andrew Scott, was 
recently favoured with an opportunity of examini.g Lilljeborg’s specimens 
of Sars’ Canthocamptus, and of comparing them with the description of 
“ Soc Part ILL, of the Ninth Aunual Report of the Fishery Board for Scotland, 
