Amphitrite ventilabrum.

A. penicillus.

A. magnifica.

A. vesiculosa.

A. volutacornis.

A. infundibulum.

A. ventilabrum. The Fan Amphitrite.

Tube subulate, smooth, of a yellowish colour.

FAMILY IV.
Serpulacea. Five genera.

1. Spirorbis. Five species.