40 THE HAUNTS OF LIFE 



out 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 sifting 

 net the little crustacean sweeps the water, 



