316 



Part III. — Fifteenth Annual Report 



XII.— THE INVERTEBRATE FAUNA OF THE INLAND 

 WATERS OF SCOTLAND. — PART VII. By Thomas Scott, 

 F.L.S., Mem. Soc. Zool. de France. (Plate IX.) ; including AN 

 ACCOUNT OF THE EXAMINATION OF SOME OF THE 

 LOCHS OF SHETLAND. By Thomas Scott, and Robert 

 Duthie, Fishery Officer. 



CONTENTS. 



PAGE 



Preliminary Remarks, ........ 316 



Notes on some brackish -water species, . . . . . .317 



Division I. — Description of the Lochs (exclusive of those of Shetland), . 318 



,, Table of species, and their distribution, .... 320 



Notes on some of the species, ..... 322 



,, Explanation of the Plate, ...... 327 



Division II. — An account of the examination of some of the lochs of Shet- 



• land, ........ 327 



Table of species, and their distribution, .... 332 



Preliminary Remarks. 



This paper, as indicated by the title, is in two divisions : in the first, 

 an account is given of all the lochs (except those of Shetland) that have 

 been examined during the past year ; while a description of some of the 

 Shetland lochs is contained in the second division. 



The lochs, exclusive of those of Shetland, examined during 1896, were 

 the following :— (1) Black Loch, (2) Achy-Lochy, and (3) Loch Ruan, in 

 the neighbourhood of Campbeltown (Cantyre), which were visited in 

 April. (4) Loch Greenan, and (5) Loch Fad, in the vicinity of Rothesay, 

 Island of Bute, also visited in April. (6) Loch Rescobie, and (7) Loch 

 Balgavie, near Forfar, which were examined in September ; and (8) Lin- 

 lithgow Loch, iu the neighbourhood of Linlithgow, examined in October. 

 A somewhat interesting tow-net gathering from Loch Frissa, Island of 

 Mull, was also sent to me by Dr John Murray ; Diaptomus Wierzejskii, 

 Richard, and Daphnia Jardinii, Baird, were both obtained in this 

 gathering. The known distribution of Diaptomus Wierzejskii in Britain 

 is as follows : — In lochs in the Shetland Islands, where it is not only of 

 frequent occurrence, but is the only member of the genus hitherto 

 observed. In the lochs of Barra and North (Jist, Outer Hebrides, where 

 it is also frequent, and in a small loch in the district of Assynt, West 

 Sutherlandshire ; its discovery in Loch Frissa, therefore, extends the dis- 

 tribution of the species considerably. 



By the examination of these lochs a few important additions have been 

 made to the fresh-water fauna of Scotland during the past year : these 

 additions include a species of Canthocamptus, believed to be new to science; 

 a species of Canthocamptus, new to Britain ; a species of Moraria, new to 

 Britain ; and a species of Cyclops, that also does not appear to have 

 hitherto been recorded for the British Islands. A species of Cyclops, new to 

 the Scottish fauna, is also recorded. The discovery of these things is the 

 more interesting when it is remembered how much has already been done 

 in the investigation of the fresh-water fauna of the British Islands. 



