154 SEA-SHORE LIFE 
scallop thus remains attached until it is from one-half to one and 
a half inches long, after which it frees itself and swims actively 
about by flapping the valves of its 
shell. The mantle edge around the 
lips of the shell is studded with dark 
iridescent blue eyes which glow 
when alive with a beautiful fluor- 
escence; and scattered between the 
eyes there are numerous delicate 
feelers. The large adductor muscle, 
that serves to close the shell, is the 
only part eaten by man, and is the 
scallop of the markets. 
The scallop breeds during the 
summer, and grows very rapidly, 
becoming more than an inch long before the winter. During 
the winter growth is very slow, but is resumed in the spring. It 

Fig. 96; ARCTIC SCALLOP. Maine. 
seems probable that scallops do not live to be more than three or 
four years old. They are captured by dredging in autumn and 
winter, but the supply in any one locality is uncertain, owing to the 
wandering habits of the animals. The scallop fishery of Connecti- 
cut and Rhode Island is worth $115,000 annually. 
The Arctic Scallop, (Pecten islandicus, Fig. 96), is very rare 
south of Cape Cod, but is quite common in depths of 150 feet and 
more off the northern New England coast. It ranges into the Arctic 
and is found on the northern coasts of Europe. The outer surface 
of the shell is covered with a scaly skin; there are about 100 shallow 
ridges, and the ‘“‘ears’”’ are unequal, the posterior one being the 
shorter and its angle obtuse. 
The Jingle Shell, (Anomia simplex, Fig. 97). This is also 
called the gold shell, or scale shell, and the name jingle shell is 
given in allusion to the ringing sound produced when the waves 
beat upon beaches strewn with the dead shells. The shell is scale- 
hke and of a greenish-yellow color. It is one to three inches broad 
and the upper valve is convex while the lower is flat or concave, 
and matches the irregularities of the surface to which the shell is 
attached. The peculiar feature of the lower valve is a large hole 
near the apex. A stout, stony stalk passes through this opening, 
