Page:Quarterly Journal of the Geological Society of London, vol. 26.djvu/250

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Lea, Isaac. Observations on the Genus Unio, together with De- scriptions of New Species in the Family Unionidae, and descrip- tions of New Species of the Melanidse and Paludinse. Vol. xii. 4to. Philadelphia, 1868.

Lehigh Coal and Navigation Company. Report of the Board of Managers. Philadelphia, 1869.

Leitner, G. W. Results of Tour in Dardistan, Kashmir, Little Tibet, Ladak, Zanskar, '&c. Vol. i. Part 1.

Letter of the President of the National Academy of Sciences, on the Operations of that Society for the past year. 1868. From the National Academy of Sciences (Washington, U. S.).

Letter of the Vice-President of the National Academy of Sciences, on the Proceedings of the Academy during the year 1866. From the National Academy of Sciences (Washington, U. S.)„

Linnarsson, J. G. 0. On some Fossils found in the Eophyton Sand- stone at Lugnas in Sweden. 8vo. Stockholm, 1869.

Login, T. Roads, Railways, and Canals for India. 8vo. London, 1869.

Ludwig, Rudolph. Versuch einer Statistik des Grossherzogthums Hessen auf Grundlage der Bodenbeschaffenheit. 8vo. Darmstadt, 1868.

Liitken, 0. F. Additamenta ad Historiam Ophiuridarum. Tredie Afdeling. 1869.

Lyman, B. S. Against the supposed former Plasticity of the Pud- dingstone Pebbles of Purgatory, Rhode Island. 8vo. Presented by Prof. A. Winchell.

. On the Link of Gunter's Chain as the Unit of a Decimal System of Weights and Measures. 8vo. From Prof. A. Winchell.

Marsh, 0. 0. Description of a New Species of Protichnites from the Potsdam Sandstone of New York.

Merian, Peter. Geognostische Uebersicht des siidlichen Schwarz- waldes. Small 8vo. Basel, 1832. Presented by Sir Charles Lyell, Part.

Merian, Peter. Leber die Grenze zwischen Jura- und Kreideforma- tion. 8vo. Basel, 1868.

Morris, John. Lead-bearing Districts of the North of England. 8vo. London, 1869.

Pourtales, L. F. de. Contributions to the Fauna of the Gulf Stream at great Depths (2nd series).