of the Fishery Board for Scotland. 



331 



Long Lochs and Flossie Loch. 



The three lochs being small and near to each other, the gatherings from 

 them were not kept separate. These combined gatherings yielded over 

 thirty species — sixteen species of Cladocera, nine of Copepoda, four of 

 Ostrac.oda, and two of Mollusca. One of the species of Mollusca — Planorbis 

 albus — is an addition to our previous lists, so also is Pleuroxus trigonellus, 

 one of the Cladocera. Canthocamptus hirticornis, Latrona setifera, and 

 Drepanothrix dentata were also observed. 



Loch of Fladdabister. 



Fewer species were obtained in the gathering from this loch than in any 

 of the others. Ten species in all were obtained, comprising five species of 

 Copepoda, four of Cladocera, and the Amphipod Gammarus Duebeni. 



Aith Loch, Bressay. 



Thirteen species (all Crustacea) were obtained from the gathering from 

 this loch, but though there was not such a variety of forms as in some of 

 the other lochs, some, at least, of the species were more or less uncommon. 

 Gammarus Duebeni, Attheyella pygrnwa, Diaptomus Wierzejslcii, and 

 Chydorus globosus are the names of some of the species found in Aith 

 Loch. 



Loch of Setter, Bressay. 



In this gathering twenty-two species were obtained, including two 

 species of Mollusca, Gammarus (? ) pulex, nine species of Copepoda, and 

 ten species of Cladocera. Canthocamptus cuspidalus was one of the 

 Copepods obtained here. 



Loch of Brough, Bressay. 



Twenty-three species of Crustacea were obtained in this loch, including 

 the two somewhat rare forms, Canthocamptus cuspidatus and Campto- 

 cercus macrurus. No Mollusca were observed. 



Insect larvae, water mites, beetles, Rhizopods, Diatoms, etc., were ob- 

 served in several of the gatherings, but have not yet been identified. 



