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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 pellucid a, 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 w T ith 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 convexa, 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. 
