“This is a rare and interesting species of Clavagella, now inhabiting the shores of Naples, presented by Sir Thomas Brisbane.

‘When that part of Lamarck's work on Invertebrata, which contained the class Conchiferœ, appeared in 1818, among the order Tubicolœ;, he introduced the genus Clavagella, of which he describes four species only, and they are all fossil. Even at the conclusion of his great work, in 1822, he appears not to have known any living species.