32 POPULAR CONCHOLOGY. 



exterior covered with sand. — There are 2 re- 

 cent species. 



This animal inhabits the seas of Europe and 

 India, and is not confined to one spot. 



5. Sabellaria. 

 Tubes, numerous, 

 united into a com- 

 mon mass, com- 

 posed of aggluti- 

 nated fragments 

 of shell and sand ; the orifices are cup-shaped. 

 — There are 2 recent species. 



It is found on rocks on the coasts of Europe. 



6. Terebella. Tube, elongated, cylindri- 

 cal, thin, and pointed at the base, membranous, 

 and having grains of sand, and fragments of 



shell adhering all round it; it is open only 

 at the apex. — There are 3 recent species. 

 This animal inhabits the Northern Seas. Dr. 



