THE WORMS 67 
The Opal-Worm, ( Lumbriconereis opalina, Fig. 54), is abund- 
ant in muddy beaches from New Jersey northward. The body is 
ringed, and each ring bears a pair of bristled feet. It is about 

Fig. 37; RED THREAD WORM. Long Island Sound, 
eighteen inches long and one-eighth of an inch wide in the 
middle, the ends gradually tapering. The head is simple and 
pointed, without feelers. The worm is of a rich bronze color 
with a brilliant play of opalescent colors over its surface. 
The Red Thread, (Lumbriconereis tenuis, Ig. 37). A shovel 

Fig. 38; FOUR-JAWED WORM. From Life. Long Island Sound. 
thrust into almost any of our muddy beaches will show that the 
mud is infested with slender, thread-like worms of deep dull-red 
