191 



New York, made to the Legislature, Jan. 29, 1850, and Feb. 1^ 

 18.51. Albany. 8vo. — Frovi Joseph G. Cogswell, Esq. 



Alphabetical Index to the Astor Library, or Catalogue, with short 

 Titles, of the Books now collected, and of the proposed acces- 

 sions, as submitted to the Trustees of the Library for their ap- 

 proval, January, 1851. New York. 8vo. — From the same. 



Report of Professor Alexander Dallas Bache, Superintendent of the 

 U. S. Coast Survey, showing the progress of that work for the 

 year ending Oct. 1850. Washington. 8vo. — -From Charles B. 

 Trego. 



A Romance of the Sea Serpent or the Ichthyosaurus. Also a Col- 

 lection of the Ancient and Modern Authorities, with Letters from- 

 distinguished Merchants and Men of Science. Cambridge, Mass, 

 1849. — From Eugene Batchelder. 



Memorial to the Congress of the United States, requesting an Investi- 

 gation and Legislation in relation to the New Method of Refining 

 Gold, of Prof. R. S. M'CuUoh, of the College of New Jersey, late 

 Melter and Refiner of the U. S. Mint. Princeton, N. J. 1851. 

 8vo. — From an unknown Donor. 



Dr. Franklin Bache announced the decease of the Rev. Sa- 

 muel F. Jarvis, a member of this Society, who died at Middle- 

 town, Conn., on the 26th March, 1851, in the 65th year of his 

 age. 



Dr. Franklin Bache having taken the Chair, Mr. Lea made 

 the following communication on the great size of certain 

 Naiades from the neighbourhood of Cincinnati: — 



On the 21st of June last, I made a communication to the Society 

 regarding the great size and weight to which some of the Naiades 

 attained in the waters of the valley of the Ohio. By some means 

 the manuscript was mislaid, and a single species only appeared on 

 the record of the minutes and in the printed Proceedings. 



The specimens noticed in that communication were much the 

 largest which had been before observed, and I deem it of sufficient 

 importance now to request their insertion. 



In a physiological point of view, it is interesting to know the ex- 

 tent to which the secreting powers of the animal may extend in cer- 

 tain species, under different circumstances, and how large a quantity 

 of carbonate of lime may be deposited by the base membrane, as ex- 

 plained by Dr. Carpenter in his paper on the mode of secretion in 

 different genera or species of the molluscs. Some of the specimens 



VOL. V. — 2 V 



