86 



in length ; the only perfect specimen which Dr. S. has seen 

 from the waters of Massachusetts Bay. 



ADDITIONS TO THE LIBRARY. 



Fremont, J. C. Capt. U. S. Army. Report of the Ex- 

 ploring Expedition to the Rocky Mountains in the year 1842 ; 

 and to Oregon and North California in 1843 and 1844. 8vo. 

 Washington, 1845. From the Hon. R. C. WintJirop. 



Johnson, Walter R. Report on the Coals of the United States. 

 Duplicate. 8vo. Washington, 1845. From Hon. R. Choate. 



Valenciennes, M. A. Observation d'une espece de ver de la 

 cavite abdominale d'un lezard vert-piquete, le Dithyridiuni la- 

 certcB. Comptes Rendus. Sept. 1844. Pamphlet, 8vo. From 

 J, E. De Kay, M. D., of New York. 



Valenciennes, M. A. Nouvelles Observations sur Porgane 

 electrique du Silure electrique, (Malopterus electricus, Lace- 

 pede.) Comptes Rendus, Aout, 1844. From sa?ne. 



Valenciennes, M. A. Description de quelques dents fossils de 

 Poissons. 4to. pamph. 1844. From same. 



Valenciennes, M. A. Nouvelles Recherches anatomiques sur 

 Le Nautile {Nautilus pompilius) Comptes Rendus. Jan. 1841. 

 4to. pamph. From same. 



Valenciennes, M. A. Recherches sur la Structure et la Na- 

 ture du Tissu Elementaire des Cartilages. 4to pamph. Nov. 

 1844. From same. 



Valenciennes, M. A. Observations sur les machoires Fos- 

 silcs des Couches oolithiques de Stonesfield, nommees Didelphis 

 Prevoslii et Didelphis Bucklandi. Pamph. 4to. Comptes Ren- 

 dus. Sept. 1838. From same. 



Valenciennes, M. A. Memoire sur le genre " Ictides,'^'' etc. 

 etc. An. des. Sc. Nat. 1825. 8vo. pamph. From sa7?ie. 



Microscopical Journal and Structural Record, for 1841 and 

 1842. Edhed by Daniel Cooper, M. D., &c. 2 vols. 8vo. 

 London. Courtis Fund. 



Proceedings of the Academy of Natural Sciences of Philadel- 

 phia, from May to October, 1845. 8vo. 



Proceedings of the American Philosophical Society, from May 

 to August, 1845. 8vo. 



