154 
BRITISH ENTOMOSTRACA. 
Hab . — Neighbourhood of London, July, August, and 
September. Old canal at Rugby ; Newnham Loch, 
Northumberland, Dr. Johnston.— 
4. Cypris eusca. Tab. XIX, fig. 7. 
Cypkis ftjsca, Straus , Mem. Mus. Hist. Nat., vii, t. 1, f. 16, 1821. 
— Desmarest, Consid. gen. et part. Crust., 381. 
— M. Edwards, Hist. Nat. Crust., iii, 101, t. 36, f. 3. 
— Baird, Mag. Zool. and Bot., i, 1 31, t. 5, f. 1 ; Trans. 
Berw. Nat. Club, ii, 152. 
— Guerin, Iconog. Regne An. Crust., t. 32, f. 1. 
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 posterior an- 
tennae only three in number, and rather short. 
Hab . — Neighbourhood of London; Hampstead, &c., 
June, July, and August.- /<?&/. 
5. Cypris compress a. Tab. XIX, figs. 14, 14 a - c . 
Cypkis compkessa, Baird, Trans. Berw. Nat. Club, i, 100, t. 3, f. 1 6, 
1835, and ii, 152; Mag. Zool. and Bot., i, 136, 
t. 5, f. 7. 
— M. Edwards, Hist. Nat. Crust., iii, 100. 
Cypkis punctata, Koch, Heutsch. Crustac., h. xxi, t. 23, 1838. 
{Not Cypkis compkessa, Koch, 1. c. t. 17.) 
Cypkis teneka, Koch, 1. e., h. xii, t. 3. 
/ -■ " 5 * * * 9 -- ' f 
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 Lynceidae. 
