132 [November, 1844. 



donations to library. 



Four sheets of the Map of New York Bay and Harbour. 



From the U. S. Treasury Department, through A. D. 



Bache, Esq., Superintendent of the U. S. Coast Survey. 

 Fauna Peruana, containing " Avium et Mammalium con- 

 spectus, quse in Republica Peruana reperiuntur, et ple- 



raque observata vel collecta sunt in itinere a Dr. J. J. de 



Tschudi." From the Author. 



Also the following works from the same Author: 

 Ueber die Urienwohner von Peru. Von Dr. J. J. von 



Tschudi. 

 Diagnosen einiger neuer Peruanischer Vogel. Von Dr. von 



Tschudi. 

 Classification der Batrachier mit berucksichtegung der fos- 



silien thiere dieser abtheilung der Reptilien. Von J. J. 



Tschudi. 4to. Neuchatel, 1838. 



A letter was read from Dr. Tschudi, dated Hamburg, Sep- 

 tember 18, 1844, accompanying the above donation of his 

 works. 



Professor Johnson read a continuation of his paper on the 

 methods of determining the calorific powers of combustible 

 bodies. 



Dr. Morton exhibited an interesting and numerous collec- 

 tion of fossil bones of the Mosasaurus, from New Jersey, con- 

 sisting of 38 nearly perfect vertebrae, a perfect tooth, several 

 fragments of other bones, and perhaps the most remarkable 

 of all, a perfect coprolite, or portion of fossil excrement of 

 this animal. 



These had all been recently obtained from the ferruginous 

 sand near Mount Holly, New Jersey, and were presented to 

 Dr. Morton by Mr. Wm. L. Bispham of this city. 



Dr. Morton then proceeded to make some brief observa- 

 tions on the general characters of the European Mosasaurus, 



