49-2 BALANID.E 



REMARKS ON BRONN'S LIST OF FOSSIL BALANINjE 



AND CHTHAMALIN.E. 



The following species of fossil Balanidse are given in that most useful work, 

 the ' Enumerator Palreontologicus' 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. 



Biadema bijidum = Coronula bifida of Bronn, in his ' Italiens Tertiar- 

 Gebilde' (1831), p. 126 (no Plate). Without a much fuller description I can 

 form no judgment on this species. 



Biadema vulgare is probably the Coronula barbara, a Crag fossil described 

 by me. 



' ' Vyrgoma undata, Michelotti, in c Bull. Soc. Geolog.' torn, x, p. 141, a mere 

 name without any description : probably it is a synonym of 



Pgrgoma sulcatum, Philippi, ' Enum. Mollusc. Sicilian,' which is a synonym of 

 Tyrgoma Anglicum of the present work ; found recent and fossil. 



Acasta Montagui is probably the extinct Aetata undulata described by me. 



Chthamalus giganteus of Philippi, is the Pachylasma giganteum of this work ; 

 found recent and fossil. 



Chthamalus stellatus, said by Philippi to be found fossil in Sicily; such 

 may be the case, but the littoral habits of the species do not render it very 

 probable. 



Balanus carbonarius of Petzholdt, found in the Carboniferous formation! but 

 I have given my reasons, in my 'Monograph on the Fossil Lepadidse,' p. 5, for 

 disbelieving that this is a Balanus, or even a Cirripede. 



Balanus ostrearum appears to be a mere name by Conrad, published by 

 Morton in his ' Synopsis of the Organic Remains of the Cretacean Group,' 

 1834, Appendix, p. 8. 



Balanus peregrinus is briefly described and poorly figured, without the 

 opercular valves, by Morton, in his ' Synopsis,' tit supra, p. 72, PI. 10, fig. 5 : 

 this Eocene species apparently resembles the Eocene B. unguiformis of Sowerby, 

 described in this work ; but quite indispensable details of structure for identi- 

 fication are not given. Another figure of this shell is given in the ' American 

 Journal of Science' (N. S.), vol. i, PI. 2, fig. 6. 



Balanus circinnatus, communis, imdpuslula, of Defrance, as well as all the other 

 species named by him, are described so imperfectly, that the descriptions are of 

 no value whatever, every description being applicable to every species : I must 

 add, that the B. communis is not the B. communis of British authors, a name 

 applied to several forms. 



Balanus Finchii is briefly described and figured, but without the opercular 

 valves, by Isaac Lea, in his 'Contributions to Geology,' 1833, p. 211, PI. 6, 

 fig. 222. I do not think that I have seen this species. 



Balanus Holgeri, Geinitz, 'Grundriss der Versteinerungcn,' tab. ix, fig, 10. 

 No opercular valves are given; this species cannot be even approximately 

 recognised. 



Balanus protein, Conrad, ' Fossil Shells of Miocene Formation of U. States,' 



