I>. ,1, sroLKFIKLl' n.V KX I'oJKJSTK'A* 'A. \7'S 



Ent., p. 130, Tab. xvi., Fig. 6 ; Lynceus nanus, Norman and 

 Brady, Mon. Brit. Ent., p. 45, PI. XVIII., Fig. 8, and XXI., 

 Fig. 8). 



AJjnella rostrata, Koch {Lynceus rostratus, Norman and Brady, 

 Mon. Brit. Ent., p. 43, PI. XIX., Fig. 1, and XXI., Fig. 6). 



Pleuroxus trigonellus, O. F. Miiller (Baird, Nat. Hist. Brit. 

 Ent., p. 134, Tab. xvii.. Fig. 3 ; Lynceus trigonellus, Norman 

 and Brady, Mon. Brit. Ent., p. 40, PL XXI., Fig. 11). 



Pleuroxus uncmatus, Baird (Baird, Nat. Hist. Brit. Ent., p. 

 135, Tab. xvii., Fig. 4 ; Lynceus uncmatus, Norman and Brady, 

 Mon. Brit. Ent., p. 42, PL XVIII., Fig. 9, and XXI., Fig. 13). 

 This is a rare species at Wanstead Park, but I found it more 

 plentifully in the autumn of 1889 than in 1891. 



Peracantlia truncata, 0. F. Miiller (Baird, Nat. Hist. Brit. 

 Ent., p. 137, Tab. xvi.. Fig. 1 ; Lyncezis truncatus, Norman and 

 Brady, Mon. Brit. Ent., p. 36, PL XXI., Fig. 9). 



Chydorus sphericus, 0. F. Miiller (Baird, Nat. Hist. Brit. Ent., 

 p. 126, Tab. xvi.. Fig. 8 ; Lynceus sphericus, Norman and Brady,, 

 Mon. Brit. Ent., p. 48, PL XXI., Fig. 12). Next to Simocephalus 

 vetulus this is the commonest of the Cladocera of Wanstead 

 Park. 



Chydorus glohosus, Baird (Baird, Nat. Hist. Brit. Ent., p. 127, 

 Tab. xvi., Fig. 7 ; Lynceus glohosus, Norman and Brady, Mon. 

 Brit. Ent., p. 47, PL XX., Fig. 5). 



I have been assured that Polyphemus pediculus used to be 

 taken at Wanstead Park, but I have never succeeded in finding 

 it. 



Branchiura. 



Argulus foliaceus, Linnseus (Baird, Nat. Hist. Brit. Ent., p. 

 255, PL XXXI.). The records of this species are simply those of 

 a few individuals that chanced to be taken swimming freely. 



OSTRACODA.* 



Cypria serena, Koch. This little species is fairly abundant 

 at Wanstead Park all the year round, but more especially 



* The generic and specific names adopted for this order are in accordance 

 with the " Monograph of the Marine and Freshwater Ostracoda of the North 

 Atlantic and of North-Western Europe," by Prof. G. S. Brady and the Eev. A. 

 M. Norman, "Scientific Trans, of the Royal Dublin Society," Ser. ii., Vol, iv., 

 Part ii., 1889, p. 63. No references seem called for in the case of these 

 animals, as the foregoing monograph contains all the intormation needed. 



JouRN. Q. M. C, Series II., No. 32. 12 



