- Sabellaria alveolata.
- S. crassissima.
3. Genus Terebella. Pl. [V].
Animal. Body tubicular, elongated, cylindrically depressed, attenuated posteriorly; a row of nodulous and setiferous papillæ on each side; numerous filiform, twisted tentacula surrounding the mouth.
Shell. An elongated cylindrical and membranous tube with lash-like appendages at the end; covered with adhesions of sand and shells. Inhabits the coast of New Holland. Four species.
- Terebella conchilega.
- T. ventricosa.
- T. cristata.
- T. vermicuta.
4. Genus Amphitrite. Pl. [V].
Animal. Body tubicular, elongated, cylindrical, attenuated behind with many annulated segments.
Shell. An elongated cylindrical tube growing thinner towards the base, of a tough membranous texture, and generally without adhesions. Mediterranean sea. Seven species.
- Amphitrite ventilabra.
- A. penicilla.
- A. magnifica.
- A. vesiculosa.
- A. volutacornis.
- A. infundibula.
- A. minima.