§2 CLASS V. ORDERS IL & Ill. 
Denraium, (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 
af the body, which may be called the back. 
Nereis, body long, creeping, with numerous 
Jateral peduncles, or feet, each side ; feelers sim- 
ple, rarely none ; eyes 2, or 4, rarely none. In 
sea. 
ApruropiTa, (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 38. ABRANCHIA. 
Having no particular respiratory organs ; but 
ihe office of respiration is performed along the 
whole surface of the skin, 
Lumericus, (angle-worm, earth-worm,) body 
round, annulate. with (generally) an elevated 
fleshy belt near the bead, mostly rough with mi- 
nute concealed prickles placed longitudinally, and 
furnished with a laieral aperture. In common 
soil, wet soil, and wet rotten wood and manure. 
Nats, (glass-woru,) body creeping, long, lin- 
ear, pellucid, depressed ; peduncles or feet with 
small bristles each side; tentacule or feelers, 
hone ; eyes two or none. Ln stagnant waters, 
rivers and wet sand. 
