196 [April, 



Memoria en que se trata del insecto grana 6 Cochinella. For Dr. Josef Anton 

 de Alzate. 



Ancient Liverpool. By J. A. Picton. 



Hieionymi Cardani Mediolanensis medici de Subtilitate libri 21. 8vo. 



Observations on tiie arts, &c., by Thos. Winstanley. New edition. 8vo. 



A practical treatise on the law of mines and minerals. By W. Bainbridge. 

 8vo. 



Notice des tableaux du Musee Royal a la Haye. 



Description des tableaux deposes au Musee Royal des Pays-Bas. 



Notice des tableaux exposes au Musee d'Anvers, 1829. 



Beitrag zur Insecten-fauna von Angola. Von Dr. W. F. Erichson. 



Dissertation physique sur le flux et reflux de la Mer et sur d'autres sujets. 

 Par M. Roubaix de Turcoin. 12mo. 



Essai sur la Marne. Par M. A. Puvis. 8vo, 



Cours gratuits de Sciences industrielles faits a I'hotel de ViUe de Metz. 8vo. 



Dissertation sur le tasnia ou Ver-plat. Par Charles Dionis. 12 mo. 



Lettres philosophiques sur la formation des sels et des crysteaux, &c. Par 

 M. Bourguet. 



Itineraires en France, pour I'etude de I'histoire naturelle et de la geologie. 

 Par M. Neree Boubee. 12mo. 



Essai sur le climat de Montpellier. Par Jacques Poiteven. 



April 8th. 



Special anatomy of the terrestrial Gasteropoda of the United States. By Joseph 

 Leidy, M. D. From the author. 



Journal of the Indian Archipelago and Eastern Asia. Vol. 4, Nos. 11, 12. 

 From the Editor. 



Thirtieth Annual Report of the Board of Direction of the Mercantile Library 

 Association of New Yorlv, January, 1851. From the Association. 



Quarterly Journal of the Geological Society. Vol. 6, No. 24. From the 

 Society. 



Transactions of the Zoological Society of London. Vol. 4, Part 1. 4to. From 

 the Society. 



Enumeration des Insectes qui consumment les tabacs. Par M. Guerin-Mene- 

 ville. Svo. From the author. 



Proceedings of the American Association for the advancement of Science. 3d 

 meeting, held at Charleston, S. S., March, 1800. From the Association. 



Conspectus Generum Avium. (C. L. Bonaparte.) pp. 430 464. Svo. 



Notes on Hybridity, designed as a supplement to a memoir on that subject in 

 the Charleston Med. Journal : and second letter on same subject to the editors 

 of same. By S. G. Morton, M. D. From the author. 



Oration by Hon. R. C. Winthrop, July 4th, 1848, on the occasion of laying the 

 corner stone of the Washington Monument. From Mr. Varden, of Washington. 



Oration by Hon. H. S. Foote, July 4th, 1850, at Monument Place. From the 

 same. 



Constitution and By-Laws of the National Institute. From the Institute. 



Contributions to Ornithology. By Sir William Jardine. Part 7, 1850. From 

 H. E. Strickland, Esq. 



Catalogue of the Knowsley collection, pp. 25 40. From the Earl of Derby. 



Microscopical examination of Soundings made by the U. S. Coast Survey. By 

 Prof. J. W. Bailey. From the author. 



On Mosasaurus and the allied new genera. By R. W. Gibbes, M. D. From 

 the author. 



Philyra. Auctor D. H. F. Delius. From Mr. Balliere. 



Verhandlungen der Gesell. Naturforsch. Freunde in Berlin. Vol. 1, pt. 6. 4to. 

 From the same. 



Dr. Wilson presented the foJlowins: on the usual condition : 



Conchologia iconica. By Lovell Reeve. Parts 93, 94. 



Traite elementaire de Conchyliologie. Par G. P. Deshayes. Liv. 12. 



Annals and Magazine of Nat. History. Vol. 7, 2d series. Nos. 37, 38. 



