of the Fishery Board for Scotland. 



247 



British fresh water species known to me, — a description of it is given at 

 the end of this Keport. 



I was informed that the loch contains trout, and as a matter of fact a 

 few post-larval specimens were found in my tow-net gatherings, but it is 

 rarely visited by anglers. The invertebrates obtained and, so far, identi- 

 fied, in the tow-net and haud-net gatherings from Lochan a Chaite are as 

 follows : — a few specimens of a variety of Limnxa peregra, a few speci- 

 mens (apparently not mature) of Gammarus, seven species of Copepoda 

 (including the form referred to above), four species of Ostracoda, and ten 

 species of Cladocera, also some Insects, Insect-larvae, one or two spiders 

 (probably recently washed into the loch), Diatoms, and some other min- 

 ute organisms. 



Lochan Lairig Eala. 



The altitude of Lochan Lairig Eala is 984 feet above sea-level. It is 

 situated close to the old Killin Passenger Station of the Callander and 

 Oban Railway — on the side opposite from the Station — and the present 

 Station at Killin Junction is about two miles north-west from the loch. 

 It is not a very large loch, but appears to be a good loch for trout fishing ; 

 a few boats are kept on it for the use of anglers, but permission to fish 

 has to be obtained. 



This loch was examined on the 13th of September by hand-net, from 

 the shore. Micro-organisms appeared to be abundant and varied. When 

 an examination of the gatherings that were collected was made, the 

 following were obtained : — viz., seven species of Copepoda and sixteen 

 species of Cladocera, or a total of twenty-three species of Crustacea. 

 Mollusca were apparently scarce in Loch Lairig Eala, so also were 

 Ostracoda. The somewhat rare Cyclops affinis — carrying ovisacs — was 

 obtained here ; Latona setifera and Acaniholebris curvirostris were also 

 obtained. 



Loch Lubnaig. 



An examination of this beautiful loch was made on September 29th. 

 Loch Lubnaig is simply an expansion of the River Leny, which, flowing 

 down through Strathyre, fills up the deepest part of the valley with its 

 pellucid waters, before continuing its course amid the rugged and bewilder- 

 ing mazes of the Pass of Leny. Owing to the configuration of the valley 

 of Strathyre the loch is narrow and elongate, being little more than a third 

 of a mile across, while its length is nearly four miles. The lower half ex- 

 tends nearly in a north and south direction, but the upper half bends round 

 to the north-west, and it is fully four hundred feet above the level of the 

 sea. Among the organisms obtained in the gatherings from this loch are 

 four species of Mollusca, seven species of Copepoda, four species of Ostra- 

 coda, and fourteen species of Cladocera, besides Insect-larvae, Acaridse, 

 Notonectidse, Diatoms and other algse, Rotifera, &c. Among the more 

 interesting Crustaceans found in this loch are Cyclops macrurus, G. O. 

 Sars, which as a member of the British fauna has so far been recorded 

 from only a few places in England and Scotland, — Loch Lubnaig 

 being a new station for it ; Ophiocamptus brevipes (G. O. Sars), another of 

 the Loch Lubnaig Copepods, is new to Britain, it somewhat resembles 

 Ophiocamptus sarsi in general appearance, but the structure of the fifth 

 pair of swimming feet is very different. Darwinula Stevensoni, Brady and 

 Robertson, — a rare British Ostracod — was also obtained in Loch Lubnaig, 

 as well as an apparently new Cla<locer;m which I have described as Alona 

 neylecta (see Notes at the end of the Report on the lochs of Shetland). 



