170 BRITISH ENTOMOSTRACA. 
4. Cythere alba. Tab. XX, fig. 6. ^ 
Cythere alba, Baird, Trans. Berw. Nat. Club, i, 98, t. 3, f. 6, 1835, 
and ii, 153 ; Mag. Zool. and Bot., ii, 143, t. 5, f. 24. 
— M. Edwards, Hist. Nat. Crust., iii, 409. 
Shell obovate, the anterior extremity much broader 
than the posterior, fringed round the edges with short 
hairs. The colour is white, and a margin extends all 
round the outer edge still whiter than the body of the 
shell. The valves are transparent, showing the dark body 
of the insect shining through. 
Hab. — Sea-shore at Dunbar, East Lothian, 1835. 
5. Cythere variabilis. Tab. XXI, figs. 10, 11. 
Cythere variabilis, Baird, Trans. Berw. Nat. Club, i, 98, t. 3, 
f. 7, a, b, 1835, and ii, 153, ; Mag. Zool. 
and Bot., ii, 143, t. 5, f. 25, a, b. 
— M. Edwards, Hist. Nat. Crust., iii, 409. 
Shell oval, the anterior extremity considerably narrower 
than the posterior, glaucous, without hairs. This species 
varies much in colour and markings ; some individuals are 
white, with two black fasciae running transversely across 
the shell, one at the posterior margin, the other across the 
centre of the valves, while the posterior extremity is marked 
besides by a beautiful reddish or bright bronze spot. 
Others are of a light flesh colour, with the edges of the 
shell slightly greenish, and the central portion marked 
with dark streaks running across. Some again are alto- 
gether of a fine flesh colour, without any marks upon the 
valves, while others are of a uniform dark brown or almost 
black hue. All these varieties, however, agree in shape, 
size, &c. 
Hab . — Coast of Berwickshire ; common ; Dover, Sept. 
1849. , 
■ ( fa dht y? J 
