August, 1846.] 91 



cinem anhans iibcr kiintslich erzeugten Guano. Von Dr. 



Eb. Fr. Manz. Stuttgart 1845. From the same. 

 Beitrage zur Petrefaktenkunde, von Heermann von Meyer. 



Fossil S'auo-etliiere. 4to. From the same. 

 G. F. Jaeger Dr. A. C. N. C. S. de monstrosa folii Phoenicis 



dactyliferse conformatione, &c.; cum tabulis 4 lithographicis. 



4to. From the same. 

 Der Schadelban des Mosasaurus durch beschreibung einer 



neuen art deiser gattung erlautert : Yon Dr. August Gold- 

 fuss. 4to. From the same. 

 Newspaper article on the geology of Middletown, (Conn.) and 



vicinity. By Joseph Barratt, M. D. From the Author. 



Letters were read : 



From A. D. Bache, Esq. dated Washington, July 31, 1846, 

 presenting the charts received this evening. 



From the Secretary of the American Philosophical Society, 

 acknowledging the receipt of certain numbers of the Pro- 

 ceedings of the Academy, furnished at the request of the Li- 

 brarian of that Societv. 



From the Secretary of the New York Lyceum of Natural 

 History, dated Aug. 5, 1846, acknowledging the receipt of 

 the last number of the Proceedings. 



From Dr. J. J. Yon Tschudi, dated St. Galen, April 4, 

 1846 ; acknowledging the receipt of the Academy's Proceed- 

 ings, and presenting the works received this evening. 



From Judge Tremper, dated Dresden, N. Y., July 1846, 

 giving the results of observations and experiments made by 

 himself, with the view of ascertaining the amount of evapora- 

 tion from land and water surface in his vicinity, and also the 

 temperature of Seneca Lake. 



A paper by Dr. Joseph Leidy, entitled, ' Description of a 

 new genus and species of Entozoa,' was read and referred to 

 Dr. Zantzinger, Mr. Phillips, and Dr. Morton. 



The Chairman exhibited a living specimen of a bird, which 

 with another of the same description, had recently been ob- 



