326 Proceedings of the Royal Physical Society. 
Diaptomus gracilis, G. O. Sars. 
Cyclops viridis (Jurine), 
Cyclops serrulatus, Fischer. 
Bosmina longirostris (Miler). 
Acroperus harpe, Baird. 
Alona quadrangularis (Miller). 
The surface tow-net gathering collected on 4th July 
was rich 
obtained :— 
in Cladocera. The following species were 
Diaptomus gracilis, G. O. Sars. 
Cyclops sugnatus (type), Koch. 
Cyclops viridis (Jurine). 
Sida cerystallina (Miller). 
Daphnella brachyura (Liévin). 
Bosmina longirostris (Miiller). 
Lurycercus lamellatus (Miller). 
Acroperus harpe, Baird. 
Camptocercus macrourus (Miller), 
Alonopsis elongata, G. O. Sars. 
Alona quadrangularis (Miller). 
Peracantha truncata (Miiller). 
Chydorus globosus, Baird. 
Polyphemus pediculus (Linné). 
Bythotrephes longvmanus, 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 (J urine). 
Cyclops serrulatus, Fischer. 
Sida erystallina (Miller). 
Daphnella brachyura (Liévin), 
Bosmina longirostris (Miiller). 
Ilyocryptus sordidus (Liévin). 
Alonopsis elongata, G. O. Sars. 
Eurycercus lamellatus (Muller). 
Chydorus globosus, Baird. 
Polyphemus pediculus (Linné). 
