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Part III, — Sixteenth Annual Report 



observed : they include four species of Copepoda, nine of Cladocera, and 

 three of Ostracoda. The names of all the species are given in the Table at 

 the end of the paper, but the following may be specially mentioned here : 

 Acantlioleheris curvirostris^ Drepanothrix dentata^ Alona rustica, and 

 Ilyocryptus sordidus. 



(2) Garry Loch on Ailsa Craig, Firth of Clyde. 



This little tarn — all that now remains of a " lochan " that was once 

 apparently of considerable depth — was visited during the month of May 

 last year while the s.s. Garland happened to be at anchor for a short time 

 under the shelter of the rock. Two species of Copepods and two of Cla- 

 docera sum up the list of Crustacea obtained, yet three out of the four 

 are comparatively rare. One of the Copepods was Moravia anderson- 

 smithij T. and A. Scott, and the other Cyclops hisetosus, Rehberg ; while 

 one of the two Cladocera was Alona rustica, T. Scott, the other being the 

 almost universally diffused Chydorus sphoericus. 



(3) Park Loch, near Campbeltown (Cantyre). 



This loch is situated on the uplands to the north of Campbeltown 

 (Cantyre). It appears to have been at one time much larger than at pre- 

 sent, but portions at either end seem to have become gradually filled up, 

 and thus reduced to a considerable extent the limits of the loch. In 

 summer a fringe of luxuriant vegetation — extensive in some parts — 

 stretches nearly all round the loch, and affords shelter and food to a rich 

 Entomostracan fauna. Forty-seven species of Crustacea were obtained 

 in some gatherings collected in August. A tow-net gathering collected in 

 the open water by means of a rowing-boat yielded a large quantity 

 of Entomostraca, but there was very little variety in respect of the num- 

 ber of species. Most of the species mentioned in the Table under Park 

 Loch were obtained in shore gatherings, collected with a hand-net. The 

 Crustacea obtained in this loch comprised 14 species of Copepoda, 17 

 species of Cladocera, and 15 species of Ostracoda, and the Amphipod 

 Gammarus dueheni was also observed. The Copepods include such forms 

 as Cyclops bicolor, Canthocamptus inornatus^ and Canthocamptus 

 sclimeilii ; while among the Ostracoda were Gandona liyalina and 

 Darwinula stevensoni ; and Alona rustica among the Cladocera — all of 

 which are comparatively rare. 



(4) Tangy Loch, near Campbeltown (Cantyre). 



This loch, situated at the head of Tangy Glen, is a short distance north- 

 westward from Park Loch, and occupies a somewhat higher elevation. 

 The physical conditions are also somewhat different : the shore nearly all 

 round is shingly or rocky, and consequently there is not such an amount 

 of aquatic vegetation. Spongilla appears to be common in the loch : 

 large pieces of it, partially decayed, were observed at various places along 

 the shore at the time of our visit. Pelagic Entomostraca were common, 

 but embraced few species, and it was found here, as elsewhere, that shore 

 gatherings yielded by far the largest variety of forms ; but both modes of 

 collecting are necessary, as some species are only to be obtained in the 

 open water. Owing to the absence of vegetation the variety of the 

 Crustacean fauna was less than in Park Loch : 27 species in all were 



