290 HISTORY OP BRITISH CRUSTACEA. 



of a pale yellow horn-colour, transparent ; front extremity- 

 sharper than the posterior. 



Hab. Cockburnspath, and in sand from Torquay. And also, 

 according to Mr. Jones, abundant as a fossil in the Crag of 

 Suffolk.* 



Cythere renieormis, Baird. — Shell kidney-shaped, 

 rough with hairs, both ends nearly equal in size ; centre of 

 valves covered with a calcareous-looking crust. 



Hab. Berwickshire, and North Foreland, near Dover. 



Cythere albo-maculata, Baird. (Plate XVII. fig. 1.) 

 — Shell oblong, both ends and the lower margin densely 

 hairy j dull-brown, covered with short spines, except where 

 marked with two white, smooth, shining spots. 



Hab. Berwick Bay, and near Dover. 



Cythere alba, Baird. — Shell obovate, broadest in front; 

 white, the margin purer white than the rest of the shell. 



Hab. Sea-shore at Dunbar. 



Cythere variabilis, Baird. — Shell oval, narrower in 

 front, varying in colour and marking from fine flesh-colour 

 to dark-brown, and often marked with streaks. 



Hab. Coast of Berwickshire, Dover. 



Cythere aurantia, Baird. — Shell somewhat kidney - 



* The Eatomostraca of the Tertiary Formation, p. 51. 



