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 



FIG. 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, 



