PELECYPODS 
FAMILY PANDORIDE 
Genus Pandora 
463 
P. trilineata. A little New England shell, remarkable on account 
of its extreme flatness. When looking at this shell before opening it, 
one naturally wonders where the animal 
finds room to exist between two such 
disk-like valves. The animal is very 
thin, with largely united mantle-edges, 
widely separated feeble adductor mus- 
eles, and a fairly large tongue-shaped 
foot. The shell is nacreous, rounded 
anteriorly, and produced posteriorly 
into a sort of upturned tip which gapes 
Pandora trilineata, 
to accommodate two little siphons. The dorsal hinge-margin is excavated 
and curved. Length about one inch. 
It is abundant at Cape Cod, in 
sandy stations, on oyster-beds, and is found from Maine to Florida. 
