Mr. R. Etlieridge on, Carboniferous Pohjzoa. 33 



given. By Agassiz* it is said to be 1826, bj D'Orbigny at 

 the end of 1829t, and by Stoliczka 1827^. The four first- 

 described species were referred by De Blainville § ancf Milne- 

 Edwards || to the genus Vincularia, Defrance, published in 

 the ' Dictionnaire des Sciences Naturelles' in 1829 ^ ; and, 

 in fact, not only were the species referred by these authors, 

 but they appear to have made the genera synonymous, retain- 

 ing, however, the latter term Vincularia. The fifth Pal^e- 

 ozoic species, previously mentioned, was shown by Mr. Lons- 

 dale to possess characters at variance with those assigned by 

 Miinster to the four earlier-described forms, insomuch that it 

 possessed cell-apertures opening on one face of the polyzoarium 

 only. For this type Lonsdale retained the abolished name 

 Glauconome and generically redefined it**. It has been so 

 used by Prof. M'Coy and other British palgeontologists, and 

 in truth, forms a very convenient Palgeozoic genus. In his 

 Index Palajontologicus ff, Dr. Bronn committed the mistake 

 of mixing up, under the name Glauconome^ the four vinculiform 

 species of Miinster, the fifth (retained by Lonsdale as typical 

 of the redefined genus), and some others — an error which, 

 however, was rectified in the ' Lethgea Geognostica ''\\, where 

 Glauconome is limited and definitely placed as a synonym of 

 Vincularia^ Defrance. D'Orbigny rejected the name Glauco- 

 nome and made it a synonym of Vincularia, Defrance, for 

 three reasons — chiefly on account of uncertain date of publica- 

 tion, because it was announced (as he thought) later than Vin- 

 cularia, and, lastly, the term had already been preoccupied by 

 Gray for a genus of Mollusca,§§. He further states that the 

 plate upon which the figures were delineated was unaccom- 

 panied by text, and that Glauconome " fut peut-etre publie a 

 la fin de 1829, certainement apr^s le geni-e Vincularia de De- 

 france." On the other hand. Prof. W. King has passed over 

 the claims of Lonsdale's redefinition of Glauconome as to 

 generic rank, and proposed in its place the name Acantho- 

 cladia, which has been pretty generally adopted by conti- 

 nental writers on Permian paleeontology, although not 

 universally so. The Chevalier d'Eichwald has also split up 



* Nomenclator Zoologicus, Polypi, p. 12. 

 t Pal. Fran?. Terr. Cret. v. p. 58. 

 \ Pal. Neu-Seeland, 1865, pp. 144, 145. 

 § Man. d'Actinologie, 1834, p. 454. 



H Lamarck's Hist. Nat. Animaux s. Verteb. 2nd ed. ii. p. 193 (Jide 

 Lonsdale). ^ T. Iviii. p. 214. 



** Murchison's Silurian Syst. 1839, p. 677. 

 tt Nomenclator, 1848, p. 531. 

 XX Band iii. Theil 6, p. 99. 

 §§ Pal. Fran?. Terr. Cret. v. p. 59. 



Ann. & Mag. N. Hist. Ser. 4. Vol. xx. 3 



