40 THE HAUNTS OF LIFE 
losing a minute, and.we are rewarded if we 
kneel down beside a pool and watch operations. 
From between the valves there are protruded 
eZ P” 
Fic. 2.—ACORN-SHELLS OR ROCK-BARNACLES (BALANUS). 
Of two kinds, large and small. Notice the Outer Rampart, 
the Movable Roof of four pieces, and the six pairs of 
Curled Feet wafting the Food into the Mouth. 
six pairs of curl-like, bristle-bearing limbs, 
each with two branches; and with this sift- 
ing net the little crustacean sweeps the water, 
