644 MR. R. GURNEY ON FRESH- AND BRACKISH- WATER CRUSTACEA. 
Lynceus elegans (Kurz). The only previous record of this 
species is from a pond in Yorkshire. It has been 
well figured by Mr. Scourfield ( 1 903), but is not 
included in the “ Cladocera Suecise.” I have found 
it in a pond at Brumstead in company with Daplmia 
A tkinsoni. 
„ rostratus, Koch. This is the characteristic Lynceid of 
the rivers of Norfolk, and it is also fairly common in 
the Broads. 
Leydigia quadrangularis (Leydig). Fairly well distributed, but 
only very rarely found in any numbers. 
„ acanthocercoides (Fischer). Heigham Sounds, Barton 
and Sutton only. 
Graptoleberis testudinaria (Fischer). 
Alonella excisa (Fischer;. 
„ exigua (Lilljeborg). The only previous record of this 
species admitted by Mr. Scourfield is his own, from 
Kew Gardens. I have found it myself in Catfield 
Fen and Sutton and Wroxham Broads. I may also 
add that it occurs in North Uist. 
,, nana (Baird). Sutton, Wroxham, Salhouse, and 
Ranworth Broads. 
Peratacantha truncata (0. F. Muller). 
Pleuroxus L/evis, Sars. Sutton, Martham, Barton and South 
Walsham Broads. 
,, trigonellus (0. F. Muller). 
,, unoinatus, Baird. 
,, aduncus (Jurine). The commonest species of the 
genus in Norfolk. 
Chydorus globosus, Baird. Rare, but fairly widely distributed. 
„ ovalis, Kurz. 
,, spH/ERicus (0. F. Muller). 
Anchistropus emarginatus, Sars. I have only seen a single 
specimen of this very rare species, and that was 
taken in Sutton Broad, in a place in which I have 
collected regularly throughout the year. 
PoLYPHEMIDiE. 
Polyphemus pediculus (Linn.). 
