Mr. R. Etheridge on Carboniferous Polyzoa. 33 



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

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

 described species were referred by De Blainville § and Mihie- 

 Edwardsll 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 Palae- 

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

 dale to possess characters at variance with those assigned by 

 Munster 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 palaeontologists, and 

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

 Index Pal93ontologicus ft? ^^'- Bronn committed the mistake 

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

 species of Mimster, 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 Avas unaccom- 

 panied by text, and that Glauconome " fut peut-etre public k 

 la fin de 1829, certainement apres le genre 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 palgeontology, 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. 

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

 § Man. d'Actinologie, 1834, p. 454. 



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

 Lonsdale). % T. Iviii. p. 214. 



** Murchison's Silurian Syst. ia39, p. 677. 

 tt Nomenclator, 1848, p. 531. 

 XX Bandiii. Theil6,p. 99. 

 §§ Pal. Fran 9. Terr. Cr6t. v. p. 69. 



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



