( Ihapter Ten 



VERMES 



1. UNSEGMENTED WORMS 



a. Platyhelminthes ( Flat worms) 



I). Nemertinea (Nemertinean worms) 



c. Nemathelminthe ^ (Round worms or thread worms) 



• I. Chaetognatha (Glass worms) 



e. Sipunculoidea 



2. ANNi:i.l I ) A ()K SEGMENTED WORMS 



1. Un segmented Worms 



When we think of worms we usually think of 

 the rather common earthworm. However, the 

 worms of the sen are sometimes very much more 

 beautiful limn the earthworm. They are of various 

 colors and many resemble Mowers and are among 

 the mosl brilliant creatures of the sea. 



There are two groups of worms the segmented 

 and the unsegmented. Although the various groups 

 of unsegmented worms are not always closely re- 

 lated, they bear a superficial resemblance and for 

 convenience will he grouped together here. 



Although there are many species of unseg- 

 mented worms, they form a relatively inconspicuous 

 part of the seashore fauna as contrasted with the 

 segmented annelid worms. Many species are very 

 minute and easily overlooked; the larger species 



no 



