154 BRITISH ENTOMOSTRACA. 



Huh. — Neighbourhood of London, July, August, and 

 September. Old canal at Rugby ; Newnham Loch, 

 Northumberland, Dr. Johnston. 



4. Cypris fusca. Tab. XIX, fig. 7. 



Cypius fusca, Straus, Mem. Mus. Hist. Nat., vii, t. 1, f. 16, 1821. 



— Desmarest, Cousid. gen. ct part. Ci'ust., 384. 



— M. Edwards, Hist. Nat. Crust., iii, 401, t. 36, f. 3. 



— Balrd, Mag. Zool. and Bot., i, 1 34, t. 5, f. 4 ; Trans. 



Berw. Nat. Club, ii, 152. 



— Gueriti, Iconog. Hegue An. Crust., t. 32, f. 4. 



Shell oval, of a uniform brown colour, sinuated on 

 under margin. The anterior extremity is narrower than 

 the posterior, which is rounded and broad. The valves 

 are covered with fine hairs. Filaments of ])osterior an- 

 tennae only three in number, and rather short. 



Hah. — Neighbourhood of London; Hampstead, &c., 

 June, July, and August. 



5. Cypris compressa. Tab. XIX, figs. 14, 14 a-c. 



Cypkis compkessa, Baird, Trans. Berw. Nat. Club, i, 100, t. 3, f. 1 G, 

 1835, and ii, 152 ; Mag. Zool. and Bot., i, 136, 

 t. 5, f. 7. 

 — M. Edwards, Hist. Nat. Crust., iii, 400. 



Cypris punctata, Koch, Deutscli. Crustac, h. xxi, t. 23, 1838. 



{Not Cypris compressa, Koch, 1. c. t. 17.) 

 Cypris tenera, Koch, 1. c, h. xii, t. 3. 



Shell of a rounded form, but compressed, narrower an- 

 teriorly than posteriorly, of a brownish-gray colour, more 

 or less deep, semi-transparent, beset at both extremities 

 with fine hairs. In general the surface of the shell is 

 spotted, as if from little pieces being hollowed out of its 

 substance. Eye large. Filaments of posterior antennae, 

 three long and one short. From the thin, compressed 

 shape of the shell, the motion of the little animal through 

 the water is very much like that of some of the Lynceida). 



