35 



7th. These observations prove that the waters of the Mississippi, 

 like those of the Nile, are crowded with organic life, and to this, 

 as Eiirenberg has proved, with regard to the Nile, is prob .bly 

 due, in no small degree, the fertilizing power of its sediment. 



8th. The minute indestructible shells of the fluviatile silicerus 

 infusoria, must be borne to immense distances by the powerful 

 current of the Mississippi, and it is even probable that they may 

 be carried into the Gulf of Mexico, to be there deposited, in 

 company with recent marine species. 



DONATIONS TO THE CABINET. 



A bottle containiug fishes and reptiles. From G. W, Colla- 

 more. 



ADDITIONS TO THE LIBRARY. 



Proceedings of the Zoological Society of London. 8vo. pamph. 

 Nos. 120 to 134. For 1843 and 1844. From the Zoological 

 Society. 



Reports of the Council and Auditors of the Zoological Society 

 of London. 8vo. pamph. 1844. From the same. 



Proceedings of the Academy of Natural Sciences of Philadel- 

 phia. Vol. ii. No. 6, for Nov. and Dec. 1844. From the Aca- 

 demy. 



March 5, 1845. 



C. T. Jackson, Vice President, in the Chair, 



Mr. Bouve read a notice of tlie Final Report upon the 

 Geological Survey of the State of New Hampshire by 

 Charles T. Jackson, M. D. 



Dr. Cabot placed upon the table mounted specimens of 

 birds from Dr. Cragin's collection, among them Caciciis 

 hcemorrhous and Cacicus icteronotns. 



