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Part III. — Thirteenth Annual Report 



frequent, and several large Bosminx, (1 Bosmina longirodris), were also 

 observed. 



This completes the list of Barra lochs that were examined. I will now 

 proceed to describe the results of the examination of the lochs of North 

 Uist. 



2nd. — Lochs on the Island of North Uist, Outer Hebrides. 



The inland portion of the Island of North Uist is low-lying and the 

 surface gently undulating ; and owing to the peculiar conformation of this 

 inland portion, a large part of it is simply a net-work of lochs and tarns. 

 So much is this the case, that a person not acquainted with the island, 

 who has happened to leave the highway to enjoy a stroll upon the moors, 

 may have to wander for hours among an apparently endless entanglement 

 of water-ways before he again finds the road. Through the kindness of the 

 Fishery Officer at Castlebay, whose jurisdiction extends to Loch Maddy, 

 I was introduced to Mr M'Kenzie (who was post-master at Loch Maddy 

 at that time, but who has since been promoted to another locality), and 

 by him to Mr Frazer, the Banker at Loch Maddy, a gentleman well 

 acquainted with the peculiar features of the Island. Mr Frazer, as soon 

 as he understood the object of my visit, endeavoured to help me all he 

 could by giving me most useful information about the intricacies of the 

 moors, and by lending me a map of the district and tracing upon it a route 

 by following which I might make the most of the time at my disposal. 



Loch Ske altar. 



This was the first loch visited. The east end of it is easily reached by 

 the road that at a short distance from Loch Maddy diverges towards the 

 south. Leaving the road where Loch Skealtar impinges upon it, I 

 followed its shore line as closely as circumstances would allow, and 

 worked the hand-net wherever a suitable place was observed. The shore 

 of this loch seems to be in general bare and stony, at anyrate very little 

 vegetation other than Litorella and small species of Juncus was observed 

 anywhere at the time of my visit ; so therefore, when the gatherings that 

 had been collected were examined, I was somewhat surprised to find 

 that they contained a large variety of micro-crustacea, including among 

 them several rare species. No fewer than thirty-one different kinds of 

 Crustacea were obtained, besides specimens of the bivalve Molluscan 

 species Pisidium pusillum ; they comprised one species of Amphipoda 

 (Gammarus duahe?ii), ten species of Copepoda, four of Ostracoda (includ- 

 ing Candona Kingslei, and Darwinula Stevensoni), and sixteen species of 

 Cladocera. Among the Cladocera there were besides Drepanothrix 

 dentata and Acantholeberis curmrostris, the rare and curious Monospilis 

 dispar. Alona neglecta, n. sp., an apparently new Cladoceran, was 

 obtained here (see Notes on this and other rare Crustacea at the end of 

 the paper). 



Loch Scadowa. 



Leaving the west end of Loch Skealtar, I struck across the moor south- 

 west to Loch Scadowa. This is a beautiful loch, with long reaches of 

 clear water. Its configuration is very irregular and confusing, especially 

 till one can get upon some high ground from which a view of its general 

 outline may be obtained. Only in some of the shallower parts of the 

 loch is vegetation at all common ; nevertheless it has, like Loch Skealtar, 

 a prolific crustacean fauna, particularly Cladocera, in which the gatherings 

 collected at this time were very rich. Mollusca appear to be very scarce. 

 I find there is no record among my notes of any species of Mollusca 



