160 ANNALS OF SCOTTISH NATURAL HISTORY 



(Trossachs) ; Loch Tay (Perthshire) ; Loch Leven (Kinross) ; 

 Rescobie Loch (near Forfar) ; Loch Ness, Loch Oich, Loch 

 Lochy, and Loch Morar in Inverness -shire. So far as 

 known to me, Loch Ness is at present the northern limit 

 of the distribution of Leptodora in Scotland. 



The Copepoda obtained in Mr. Clark's collection included, 

 amongst others, the somewhat rare Diaptomus laciniatus, 

 Lilljeborg, which in Scotland has only hitherto been 

 found in Loch Doon in Ayrshire. This well-marked species 

 was moderately frequent in Loch Vrotachan and Loch 

 Phadruig, and also in a small loch above Loch Vrotachan. 

 Diaptomus gracilis, G. O. Sars, was common in Loch 

 Callater, as well as in the neighbouring Loch Kandor. The 

 Cyclops observed in these lochs of West Aberdeenshire were 

 for the most part common forms. Cyclops strenuus, Fischer, 

 and Cyclops albidus (J urine), occurred in several of the lochs ; 

 while Cyclops fuscus was only observed in one of the Loch 

 Phadruig gatherings. 



The Harpacticidse were somewhat scarce in the collec- 

 tions, but they included one or two moderately rare forms ; 

 for example, the rare CantJiocamptus cuspidatus, Schmeil, 

 was obtained from Loch Etichan, to the northward of 

 Braemar, and from Loch-an-eion : this loch, by the way, is 

 not the one near the boundary line that divides the county of 

 Perth from that of Aberdeen, but is situated on the north- 

 west side of Lochnagar. Cantlwcamptus zschokkei, Schmeil, 

 occurred in Loch Kandor and in Loch Phadruig ; while 

 another species, Moraria anderson-smithi, was obtained in 

 Loch Phadruig and in Loch Etachan. 



The Ostracoda, as has already been remarked, were 

 poorly represented in these collections ; the following three 

 species, all of which are more or less common, were the only 

 ones observed, viz. Cypris opJitJialmica (Jurine), Loch Vro- 

 tachan ; Cyclocypris serena (Koch), Loch Phadruig ; while 

 the third, Cypridopsis villosa (Jurine), was moderately rare in 

 Loch Vrotachan, along with Cypria opJitJialmica. 



Leaving to a future paper a more detailed discussion 

 of Mr. Clark's collections, I will now proceed (2) to notice 

 some of the rarer species of Entomostraca obtained in the 

 pools on the King's Links. 



