46 THE WORMS. 
worm-like polyzoan. They are the commonest objects of 
the sea-shore, and are often pressed under the name of 
sea-mosses. Some occur in fresh water. They multiply 
by budding and by summer and winter eggs, the young 
of the latter being at first free swimmers. 
Fic. 45.—A moss animal (Plumatella repens), Fic. 46.—Brachiopod 
zodids expanded and retracted. showing arms. 
Class V.—Lamp SHELLS (Brachiopoda). 
The Brachiopods (Fig. 46) are worms that secrete 
unequivalved shells with or without hinges. The arms are 
oneach side of the mouth, and in some appear in spirals 
supported by loops. By the motion of the fringes of the 
arms, food is thrown into the mouth; they are also re- 
spiratory organs. The Lingula (Fig. 47) is an example 
Fic. 47.—Lingula anatina, 
common in the sand south of Cape Charles, where they 
make sand-tubes about their peduncles or stems. The 
young are at first free swimmers by means of cilia. Allied 
