B. crassus of Sowerby, a synonym for [B. tintinnabulum].
B. latiradiatus, Münster, probably a synonym of [B. tintinnabulum], see remarks under B. ornatus.
B. pectinarius, Bronn (‘Italiens Tertiär-Gebilde,’ p. 128), does not appear to me fully enough described to be recognised.
B. pictus of Münster, possibly a synonym of [B. amphitrite]: see remarks under B. ornatus and [balanoides].
B. plicarius, Bronn: see remarks under B. pectinarius.
B. porosus of Hausman (according to Münster of Blumenbach). I cannot recognise this species in Münster’s ‘Beiträge.’
B. pustularis of Lamarck, ‘Animaux sans Vertèbres.’ Scarcely one of the fossil species of [Balanus], described by Lamarck, can be recognised; the descriptions are extremely imperfect. There is a figure of B. pustularis in Münster’s ‘Beiträge,’ which makes me think that this may be a synonym of B. concavus of Bronn.
B. pyramidalis, Münster: see remarks under B. ornatus.
B. rhomboicus, Bronn: see remarks under B. plicarius.
B. squamosus, Defrance: see remarks under B. circinnatus.