286 HISTORY OF BRITISH CRUSTACEA. 



uiostraca of the Tertiary Formation/ p. 15), that it is a 

 common species, but has escaped observation to some ex- 

 tent, as it has the habit of remaining on or in the mud, 

 rather than swimming in the water and crawling on the 

 weeds. In this love of the mud, and habit of crawling, it 

 very much resembles the species of the next genus. 



Gen. 156. CANDONA, Baird. 



Like Ci/pris, but the lower antennae have not the pencil 

 of long hairs or filaments. The animal creeps at the bot- 

 tom or upon aquatic plants, instead of swimming freely 

 through the water. 



Can dona litcens, Baird. — Shell somewhat kidney-shaped; 

 valves pure white, pearly, nearly opaque. 



Hab. Near London, etc. 



Candona reptans, Baird. (Plate XVI. fig. 6.) — Shell 

 ovate-elliptical; valves very pale green, variegated on the 

 front and hind margins. 



Hab. Near London, etc. 



One of the largest of the bivalve Entomostraca found in 

 our fresh-water. Mr. Rupert Jones finds it abundantly in 

 a fossil state, in peat deposits and in fresh-water marl. 



