326 Proceedings of the Royal Physical Society. 
The surface tow-net gathering collected on 4th July 
The following species were 
was rich 
obtained :— 
in Cladocera. 
Diaptomus gracilis, G. O. Sars. 
Cyclops viridis (Jurine). 
Cyclops serrulatus, Fischer. 
Bosmina longirostris (Miiller). 
Acroperus harpe, Baird. 
Alona quadrangularis (Miiller). 
Diaptomus gracilis, G. O. Sars. 
Cyclops signatus (type), Koch. 
Cyclops viridis (Jurine). 
Sida erystallina (Miller). 
Daphnella brachyura (Liévin). 
Bosmina longirostris (Miiller). 
Eurycercus lamellatus (Miiller). 
Acroperus harpe, Baird. 
Camptocercus macrourus (Miller). 
Alonopsis elongata, G. O. Sars. 
Alona quadrangularis (Miller). 
Peracantha truncata (Miiller). 
Chydorus globosus, Baird. 
Polyphemus pediculus (Linné). 
Bythotrephes longimanus, Leydig. 
The under-surface tow-net gathering was from a depth of 
one fathom, and was collected on the same date as the 
surface gathering. 
Twelve species were obtained in this 
gathering, the names of which are as follow :— 
Cypris reticulata. 
Diaptomus gracilis, G. O. Sars. 
Cyclops viridis (Jurine). 
Cyclops serrulatus, Fischer. 
Sida crystallina (Miller). 
Daphnella brachyura (Liévin), 
Bosmina longirostris (Miiller). 
Llyocryptus sordidus (Liévin). 
Alonopsis elongata, G. O. Sars. 
Eurycercus lamellatus (Muller). 
Chydorus globosus, Baird. 
Polyphemus, pediculus (Linné). 
