292 HISTORY OF BRITISH CRUSTACEA. 



Hab. Devonshire, Dorset, Tenby. 



Cythere acuta, Baird. — Shell oval, convex, pointed at 

 both ends, pale horny ; in shape somewhat resembling a 

 grain of oats. 



Hab. Arran, in sand. 



Cythere pellucida, Baird. — Shell oblong, kidney-shaped, 

 narrow, both ends rounded ; pellucid, of a white colour. 



Hab. Boston, in sand. 



Cythere impressa, Baird. — Shell oval, very convex, sur- 

 face covered with impressed punctures; colour dull blackish. 



Hab. Torquay, in sand. 



Cythere quadridentata, Baird. — Shell oval, oblong, 

 narrower in front, and produced there and terminating in 

 four distinct prominent teeth. Shell white, surface longi- 

 tudinally striated. 



Hab. In sand. 



Cythere convex a, Baird. — Shell rounded, very convex, 

 and resembling in appearance a small Cowrie-shell. The 

 surface with numerous white raised points, radiating round 

 the circumference. 



Hab. Torquay; Tenby, in sand. 



