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Debey, Dr. M. H. Uebersicht der urweltlichen Pflanzen des Kreide 

 gebirges iiberhaupt, und der Aachener Kreide -schichten insbe- 

 sondere. Sir R. I. Murchison, F.G.S. 



Entwurf zu einer geognostiscb-geogenetischen Darstel- 



lung der Gegend von Aachen. Sir R. I. Murchison, F.G.S. 



Be Koninck, Br. L. Description des Animaux fossiles qui se trou- 

 vent dans le Terrain Carbonifere de Belgique. Supplement. 



. Nouvelle Notice sur les Fossiles du Spitzberg. 



. Discours sur les Progres de la Paleoutologie en Belgique. 



Des Moulins, C. Etudes sur les Echinides, 1°"^ partie. S. P. 

 Pratt, Esq., F.G.S. 



B'Orhigny, A. Prodrome de Paleoutologie stratigraphique univer- 

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Cours elementaire de Paleoutologie et de Geologie. 



Vol. ii. fasc. 1, and Tables. 



Leonbard, G. Die Quartz-fiihrende Porpbyre. T. R. Jones, Esq., 

 F.G.S. 



Faraday, Br. M. Experimental Researches in Electricity. — On the 

 Lines of Magnetic Force. 



Forchhammer, G. Hans Christian Orsted. Mindeskrift. 



Great Britain Coasting Pilot, by Capt. G. Collins, 1 723. T. R. Jones, 

 Esq., F.G.S. 



Introductory Lectures delivered at the opening of New College, Lon- 

 don. The Principal of New College. 



Lea, Isaac. On the genus Acostaea of D'Orbigny, a freshwater La- 

 mellibranchiate. 



, and H. C. Lea. Description of a new genus of the 



family Melaniana, and of many new species of the genus Melania. 



Descriptions of five new species of Anodontse. 



Leymerie, A. Memoire sur un nouveau type Pyreneen parallele a la 

 Craie proprement dite. 



Jjyell, Sir C. A Manual of Elementary Geology. 4th Edition. 



Mackinnon, W. A. History of Civilization and Public Opinion. 3rd 

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Murchison, Sir R. I. On the Silurian Rocks of the South of Scot- 

 land. 



. On the Slaty Rocks of the Sichon. 



. On the Earlier Volcanic Rocks of the Papal States. 



. On the Vents of Hot Vapour in Tuscany. 



. On the Distribution of the Flint Drift of the South-East 



of England. 



