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 CRUSTACEANS and the Ow^e, and also generally stated to occur ' in the rivers and broads of the East-Anglian fen district.' ^ Paradoxostoma variabile (Baird), from the Ouse. Baird describes this species as rejoicing in a variety of colouring, which will please or exasperate the naturalist according to taste. Its shell may be almost black, or of a uniform dark brown, or altogether of a fine flesh colour, or of a light flesh colour with greenish edges and the centre crossed by dark streaks, or it may be white with one black band across the middle and another behind attended by a beautiful reddish or bright bronze spot.* Paradoxostoma abbreviatum, Sars, from the Ouse.* Paradoxostoma ensiforme, Brady, from the Ouse.^ Paradoxostoma normani Brady, from Breydon Water.* Paradoxostoma Jlexuosum, Brady, from the Ouse, but in this case the Yorkshire Ouse is perhaps intended.* Sclerochilus contortus, Norman, taken on the Norfolk coast by Mr. D. O. Drewett." To this catalogue of Ostracoda might be added not a few species, which are described as ubiquitous in Great Britain or as common throughout the East-Anglian district. Of the Cladocera, entomostracans with branched antenna. Dr. Brady records Moina rectirostris (O. F. Miiller) as having been taken in Norfolk by Mr. D. J. Scourfield,' and this group is certainly represented in the county by species of the universally distributed Daphnia, of Lynceus and other genera, which will better be discussed when there is ample room and verge enough to trace their characters. Since Norfolk is rich in fishes, it is sure also to be rich in the parasitic Copepoda, by which fishes are beset in a striking variety of eccentric forms. Since also the county has both tracts of fresh water and a sea coast, it is sure to have a multitude of species of free-living Copepoda, though only a few seem to have been especially mentioned as occurring within its limits. Dr. Brady records three of the family Cyclopidas and two Calanids. Cyclops scourjieldi, Brady, from Wroxham, Filby and Rollesby broads and Heigham Sound. Mr. Scourfield has also taken it in the ' Victoria Regia Tank, Royal Botanic Gardens, Regent's Park.' Dr. Brady himself has taken it by moonlight in Coniston Lake.' This species is now again identified with C. leuckarti, Claus, from which Dr. Brady thought it should be distinguished. Cyclops viridis (Jurine), from the broads of Norfolk and Suffolk. This widely distributed species occurs in slightly brackish water at Lymington in Hampshire. In his Ray Society Monograph, Dr. Brady recorded the Norfolk form as Cyclops gigas, Claus, a ' giant ' one-ninth ' Monograph, pt. i. p. 228 ; Ann. Nat. Hist., ser. 4, vol. vi, p. 33. 2 Ibid. p. 33 ; Brit. Entom., p. 170. ' Ann. Nat. Hist., ser. 4, vol. vi. p. 33. ■* Ibid. p. 33, compared with Monograph, pt. i. p. 231. '' Nat. Hist. Trans. Northumberland, vol. xiii. pt. ii. p. 245, 1 898. ^ Ibid. vol. xi. pt. i. p. 75 (lo), 1891. 197
 * Monograph, pt. i. p. 237. ^ Trans. Linn. Soc, vol. xxvi. p. 456.