326 [Dec 1847. 



Measurements from bones of fore-leg. 



Transverse diameter of lower articular surface of os humeri . . .75 

 Antero-posterior diameter in depressed portion of same . . . .45 

 uength of olecranon above the lowest part of the articular surface of 



the elbow . 95 



Explanation of the figures. 

 No. 1. Cranium of Poebrotherium Wilsoni. 



2. View of the crowns of the superior molar teeth of the right side. 



3. Posterior view of the tympanic bone. 



4. Fragments of os humeri, ulna, and radius. 



No. 5. Section of articular cartilage, frcm the articular surface of the head 

 of the tibia of Megalonyx laqueatus, highly magnified, as described 

 on page 313. 

 6. Portion of the crown taken from a fragment of a fossil horse tooth ; 

 see page 328. 



The Monthly Report of the Corresponding Secretary was 

 read and adopted. 



ELECTION. 



The Hon. George M. Dallas, Vice President of the United 

 States, John H. B. McClellan, M. D., and John L. Ludlow, 

 M. D., of Philadelphia, were elected Members. 



Stated Meeting, December 7, 1847. 

 Vice President Morton in the Chair. 



DONATIONS TO MUSEUM. 



Pecten encyclicus, Rav., from South Carolina. Presented by 

 Dr. Ravenel, of South Carolina, through Dr. Morton. 



Two Trilobites, and a cast of a third, from the vicinity of Cin- 

 cinnati, Ohio. Presented by Dr. Dickeson. 



Several specimens of Diallage, fromMarple, Del. Co., Penn. 

 From Dr. George Smith, through Mr. Cassin. 



