XXI 



ORDERS 



THE CLASfe Otf WOKM& 

 FAMILIES. Genera. 





ARENICOLID^K or 



SAND- WORM Arenicola 

 FAMILY I 



or Sand- Worms or Lob- 

 Worms. 



SERPULIDJS or ! 



SEKPULA ! Serpula 

 FAMILY. 



or Serpulae. 



LUMBRICID.E or 

 EARTH-WORM i Lumbricus 

 FAMILY. 



or Earth- Worms. 



II 



SsB 



HlRUNDINID.E Or 



LKECH FAMILY. 



CESTOIDS or 



TAPE-WORM 



FAMILY. 



GORDIID.E or 



HAIR-WORM 



FAMILY. 



Tcenia 



or Tape- Worm 



Gordius 



or Hair- Worms. 



THE BRANCH OF MOLLUSCA OR MOLLUSKS. 



THE 



OR CEPHALOPODS. 



