286 
HISTORY OF BRITISH CRUSTACEA. 
mostraca 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. C ANCONA, Baird . 
Like Cypris , but the low r er 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 w r ater. 
Candona lucens, Baird.— Shell somewhat kidney-shaped; 
valves pure white, pearly, nearly opaque. 
Hab. Near London, etc. 
Candona reptans, Baird. (Plate XYI. 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- w^ater. Mr. Rupert Jones finds it abundantly in 
a fossil state, in peat deposits and in fresh-water marl. 
