230 [June, 



June \lth. 



Twenty-two species of marine Algae. Presented by Mr. John Hooper, of 

 Brooklyn, L. I. 



Laminated Peroxide of Iron, from the red sandstone of Connecticut. From 

 Dr. R. Bridges and S. Powel. 



A Microscope by Oberhaueser. Deposited by Dr. J. K. Mitchell, on the usual 

 condition. 



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Human Physiology. By Robley Dunglison, M. D. 7th ed. 2 vols. 8vo. 

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Novorum Actorum Acad. Caesar. Leopold-Carolinae Nat. Curiosorum, Vol. 22, 

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American Journal of Science and Arts, May, 1851. From the Editors. 



A proposal to establish and maintamone uniform system of Weights, Measures 

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Archiv fur Naturgeschichte. Herausg. von Dr. F. H. Troschel. Nos. 2, 3. 

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Des Races Humaines. Par P. P. Bosc. 4to. 



Nuove osservazione intorno alle Cocciniglie ed ai Loro Pretesi Maschi. Del 

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J. F. Blumenbachii decas collectionis suae Craniorum diversarum gentium 

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Dissert, med. inaug. de Taenia. Auctore G. Andreae. 



Dissert, physico-med. inaug. de Vermibus intestinalibus hominum. Auctore 

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Mittheilungen aus den Verhandlungen des Gesell. naturforsch. Freunde zu 

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Mittheilungen der Naturforsch. Gesell. in Bern 1843, '44, '45, '46, '47. 



De I'education des Vers a sole, d'apres la methode du Comte Dandolo. Par M. 

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Description des Oursins fossiles du Department de I'Isere. ParM. AlbinGras. 



Principes fondamentaux de Semeiologie. Par C. F. Rafinesque-Schmaltz. 



Catalogus de livres comprenant la Bibliotheque de feu Mr. A. Goldfuss. 



Synopsis of the contents of the British Museum. 57th ed. 12mo. 



Cuvier. Histoire de ses travaux. Par P. Flourens. 2d ed. 12mo. 



Observationes quaedam Heiminthologicae. Auctore J. H. Eber. 



Entwickiung des Hummereies von dem ersten Veranderungen im Dotter an bis 

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Useful Knowledge : or a familiar account of the various productions of Nature. 

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Memoire sur les Polypiers de mer Par J. E. Roques de Maumont. 8vo. 



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