; Q2 CLASS V. ORDERS II. & III. 



DENTALIUM, (tooth-shell,) animal a terebella ; 

 shell univalve, tubular, strait or slightly curved, 

 with an undivided cavity open at both ends. 



ORDER 2. DORSIBRANCHIA. 



Respiratory organs distributed along one side 

 of the body, which may be called the back. 



NEREIS, body long, creeping, with numerous 

 lateral peduncles, or feet, each side ; feelers sim- 

 ple, rarely none ; eyes 2, or 4, rarely none. In 

 sea. 



APHROBITA, (aphrodite,) body creeping, ob- 

 long, covered with scales, and furnished with nu- 

 merous bristly fasciculate feet, each side ; mouth 

 terminal, cylindrical, retractile ; feelers 2, seta- 

 ceous, annulate ; eyes 4. In sea. 



ORDER 3. ABRANCHIA. 



Having no particular respiratory organs ; but 

 the office of respiration is performed along the 

 whole surface of the skin. 



LUMBRICUS, (angle- worm, earth-worm,) body 

 round, annulate, with (generally) an elevated 

 fleshy belt near the head, mostly rough with mi- 

 iiute concealed prickles placed longitudinally, and 

 furnished with a lateral aperture. In common 

 soil, wet soil, and wet rotten wood and manure. 



NAIS, (glass- worm,) body creeping, long, lin- 

 ear, pellucid, depressed; peduncles or feet with 

 small bristles each side ; tentacular or feelers, 

 none ; eyes two or none. In stagnant waters, 

 rivers and wet sand. 



