162 



MARINE INVERTEBRATES 



Orders 



Families 



AMPHICTENID.K 



MALDANIDJE 



ARENICOLID-BE 

 SABELLIDJE 



SERPULIDJE 



Genera 

 Cistenides 

 ( Clytnenella 

 \ MaMane 

 Arenicola 

 Sabella 

 ( Serpnla 

 \ Spirorbis 



Species 

 C. Gouldii 

 C. torquata 

 M. elongata 

 A. marina 

 S. microphthalma 

 S. dianthus 

 S. borealis 



SIPUNCTJLOIDEA 



Subclass 

 Oligochseta 



(Mostly terrestrial or fresh-water forms) 

 Class 



GEPHYREA 



( Sipuncuhis S. nudus 



\ Phascolosoma P. Gouldii 



Class 

 HIRUDINEA 



(Leeches) 



