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Part III. — Thirteenth Annual Hepori 



beach must be subject to evaporation or overflow, according to the condition 

 of the weather. When visited, after protracted drought, the water was 

 low, and the weather cold and windy. All round the margin is a beach 

 of rough stones, and there is an absence of vegetation, except a small 

 patch near the southern extremity of the loch, and too far from the shore 

 to be reached by the hand-net. Fauna seemed scarce. 



Third. — Lochs on The Mainland. 



Loch op Brindister. 



This loch, which lies some 5 miles south from Lerwick, has an elevation 

 of over 200 feet above the sea-level. It is of a circular form, and about 

 one-third of a mile in diameter. When examined by means of the 

 hand-net, on 20th August, there was not much appearance of life in it ; 

 but a small loch not far from it, at a bend of the road near Quarff, con- 

 tained a plentiful growth of vegetation, and the fauna was abundant. 



Loch of Clickimin, near Lerwick. 



This loch is chiefly interesting on account of the remains of a Pictish 

 Brough on its southern shore. Free-swimming animalculae seemed scarce, 

 but specimens were found adhering to stones along the margin. Vegeta- 

 tion was not plentiful, but it was late in the season (20th October) when 

 the loch was examined. 



Trout were not formerly found in this loch ; but recently, since the 

 outlet to the sea was improved, one or two have been found along its 

 shores in a dead or dying condition, and very much swollen. It would 

 be interesting to know the cause of this. 



North Loch (of Clickimin). 



The North Loch is quite near the Loch of Clickimin, and a small burn 

 connects them. When examined on. 26th September, it was found to 

 contain numerous animalcuise, mostly copepods. The sandy shores were 

 generally covered with a deposit of black, mossy sediment and a growth 

 of green, slimy matter, which were very difficult to avoid with the hand- 

 net. 



SECTION II. 



In this section we propose to give the results of the examination of the 

 gatherings from the various lochs described in Section I. including a re- 

 cord of the various organisms observed in each of the lochs. The lochs 

 will be referred to in the same order as in Section I. 



First. — Lochs on the Island of Unst. 

 Loch of Cliff. 



The gatherings from this loch contained a fair abundance of Crustacea, 

 but very few Mollusca. Among the more interesting species of Crustacea 



