190 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
CERONIA ARCTATA (Conrad). 
Fig. 43. Length, 25 mm. 
For years I had searched for Uving specimens of Ceronia ardata 
without success. On all the beaches explored I would find dead 
specimens with valves separated and generally much worn. 
Fig. 43. — Ceronia ardata (Conrad). 
This was all the more amazing on a Gloucester beach where they 
were found by hundreds. A few years ago I visited Sahsbury 
Beach with a dispairing hope that I might find a living specimen, 
and to my dehght found the beach literally strewn with thousands 
of them. Contrary to the condition in most lamellibranchs the 
