of the Fishery Board for Scotland. 



183 



Cladocera. 



Bosmina longirostris (Mtiller). Alona guttata, G. 0. Sars. 



Daphnia longispina, Miiller. Alona quadrangular is (Miiller). 



Eurycercus lamellatus (Miiller). Alonella exigua, Lillj. 



Acroperus harpce, Baird. Harporhynckus falcatus, G. 0. Sars. 



Alonopsis elongata, G. 0. Sars. Chydorus sphcericus, Muller. 



Second. — Lochs on the Island of Whalsay. 



Loch of Sandwick. 



The gathering from the Loch of Sandwick contained a few rather rare 

 eutomostraca. I mention particularly the more noteworthy forms, — 

 Attheyella zschokhei, Schraeil ; Latona setifera (Miiller) ; Grajrtoleberis 

 testudinarius, Fischer, and Alonella nana (Baird). Mollusca were very 

 scarce. Notonectes, Insect larvas, Diatoms, and other organisms were also 

 observed. 



MOLLUSCA. 



Pisidium pusillum, Gruelin. Limncea percgra (Muller). 



CRUSTACEA. 



COPEPODA. 



Cyclops signatus, Koch. Cyclops scrrulatus, Fischer. 



Cyclops strenuus, Fischer. Attheyella zschoTckei, Schmeil. 



Cladocera. 



Latona setifera (Miiller) Graptoleberis testudinarius, Fischer. 



Ceriodaphnia quadrangula (Muller). Alona quadrangular is (Muller). 

 Eurycercus lamellatus (Miiller). Alonella exigua, Lillj. 



Alonopsis elongatus } G. O. Sars. Alonella nana (Baird). 



Loch of Huxter. 



Among the Crustacea obtained in this loch were the following rather 

 rare and interesting species : — Diaptomus serricomis, Attheyella zschokkei, 

 Cantlwcamptus hirticornis, and Chydorus globosus. Mollusca appeared to 

 be rather rare. Fragments of the common pond-weed, Potamogeton 

 perfoliatum, were obtained in the gathering from Loch of Huxter, as were 

 also Rotifera, Rhizopoda, Diatoms. &c. 



MOLLUSCA. 

 Planorbis nautileus (Linne). 



