New Polychaeta from Beaufort, with a key to all species recorded from North Carolina.

The setae are organs of locomotion, though their large size and occasionally jagged edges in some of the Polychaeta suggest an aggressive function.

Finally, there are certain Polychaeta, e g. the Capitellidae, in which the vascular system has vanished altogether, leaving a coelom containing haemoglobin-impregnated corpuscles.