REMARKS ON BRONN’S LIST OF FOSSIL [BALANINÆ] AND [CHTHAMALINÆ].
The following species of fossil [Balanidæ] are given in that most useful work, the ‘Enumerator Palæontologicus’ in Bronn’s ‘Gesichte der Natur:’ it has appeared to me that a few words on each species, might hereafter save others the trouble of searching through several works.
Tubicinella maxima of Morren, said to have been found in the Chalk: this would have been a wonderful fact, considering that no true sessile cirripede has hitherto been found in this formation, and that it implies the existence of Cetacea at this period; but I have been informed that the fossil in question is not a Cirripede.
Diadema bifidum = Coronula bifida of Bronn, in his ‘Italiens Tertiär-Gebilde’ (1831), p. 126 (no Plate). Without a much fuller description I can form no judgment on this species.
Diadema vulgare is probably the [Coronula barbara], a Crag fossil described by me.
Pyrgoma undata, Michelotti, in ‘Bull. Soc. Geolog.’ tom. x, p. 141, a mere name without any description: probably it is a synonym of
Pyrgoma sulcatum, Philippi, ‘Enum. Mollusc. Siciliæ,’ which is a synonym of [Pyrgoma Anglicum] of the present work; found recent and fossil.
Acasta Montagui is probably the extinct [Acasta undulata] described by me.