24 CARBONIFEROUS LAMELLIBRANCHIATA. 



rhynchus minax. In an appendix issued in 1860 are fuller lists of Carboniferous 

 Lamellibranchs from the county of Staffordshire. 



1845. Morris furnished the chapter on the " Fossil Mollusca of New South Wales 

 and Van Diemen's Land " in Strzelecki's ' Physical Description of New South Wales 

 and Van Diemen's Land,' published in 1845. He enumerates and figures the 

 following species from rocks of supposed Carboniferous age : 



Allorisma curvata. 



Pachydomus cordatus, new genus =: Mega- 

 desmus, Sow., name previously occupied. 

 Pachydomus antiquatus. 

 — cuneatus. 



— glohosus. 



— carinatus. 



Ortlionota ? costata. 



— compressa. 



Eurydesma, new genus. 

 Pterinea macroptera. 

 Pecten Illawarensis. 



— limeeformis. 



— Fittoni. 



— squamuliferus. 



In 1845 Murchison, de Verneuil, and de Keyserling brought out ' Le 

 Geologic de la Russie d' Europe/ in which several Carboniferous Lamellibrancha 

 are figured and described ; fourteen species belonging to nine genera are said 

 to be new, namely : 



Pecten ellipticus. 



— suh-Jimhriatus. 



— Sihericus. 



— Bouei. 



— Valdaicus. 

 Avicula sub-papyracea. 

 Mytilus Teplofi. 



Mytilus Pallasi. 

 Pinna Ivaniskiana. 

 Schizodus Possicus. 

 XInio Eichwaldianus. 

 Cardium Ouralicum. 

 Sanguinolaria EOmeri. 

 Solemya Piarmica. 



In 1846 de Keyserling published his ' Petschoraland,' with figures and 

 descriptions of four Carboniferous bivalves, only one of which, Pecten subclathvatus, 

 was new. 



De Ryckholt's ' Melanges paleontologiques,' the first part of which is dated 

 1850, and the second part 1853, seems to be the next important work on 

 Carboniferous Mollusca to appear. The names of the new species are all dated, 

 and vary from 1847 to 1853. Fortunately there will not arise any question of 

 precedence of names on this account, for few publications on the subject appeared 

 about this time. In Part I thirty-six new species and one new genus (Phola- 

 domya) of Carboniferous Lamellibranchiata are figured, the description of the 

 latter being found in Part II, where fifty-six new species and three new genera 

 of bivalves — Anomiaiiella, Scaldia, Omalia — from Carboniferous beds are defined 

 and depicted. The figures seem to have been somewhat idealistic when com- 

 pared with those of the same specimens published in de Koninck's great work. 



