156 BRITISH ENTOMOSTRACA. 



8. Cypris elongata. Tab. XIX, fig. 6. 



Cypkis elongata, Baird,Trms. Berw. Nat. Club, i,99, t.3, f. 10, 1835, 

 and ii,152 ; Mag. Zool. aud Bot., i,137, t. 5, f.l3. 

 — 31. Edwards, Hist. Nat. Crust., iii, 40i. 



Shell wedge-shaped ; anterior extremity much broader 

 than posterior, which is narrow and much elongated. The 

 valves are elevated on the upper margin, towards the an- 

 terior extremity, and situated on the under edge ; they 

 are white, transparent, and hauy. 



Had. — At Yetholm, Roxburghshire, July 1835. 



9. CypRis Westwoodii. Tab. XIX, fig. 9. 



Cypris Westwoodii, Baird, Traus. Berw. Nat. Club, i, 99, t. 3, f. 12, 

 1835, and ii, 152; Mag. Zool. aud Bot., 

 i, 137, t. 5, f. 14. 

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



Shell reniform, much elevated, and rounded on upper 

 margin, deeply sinuated underneath ; rather broader at 

 anterior extremity, of a green colour, and semi-transparent. 

 The valves are covered all over with rather long hairs, and 

 the filaments of posterior antennae are very long. 



Hab. — Yetholm Loch, Roxburghshire, July 1835. 



10. Cypris gibbosa. Tab. XIX, fig. 8. 



Cypris girbosa, Baird, Mag. Zool. and Bot., i, 137, t. 5, f. 15, 1837; 

 Traus. Berw. Nat. Club, ii, 152. 

 — M. Edivards, Hist. Nat. Crust., iii, 401. 



Shell ovate, and much elevated on the upper margin, 

 the centre exhibiting a large gibbosity or hump ; sinuated 

 underneath. The valves are smooth, except round the 

 edges, which are beset with short, fine hairs, are nearly 

 opaque, and of a light green colom', the anterior extremity 

 being paler than the other parts of the shell. Filaments 

 of both pairs of antennae beautifully plumose. 



Hab. — Ditch near the Surrey Zoological Gardens, June 

 1836. 



