APPENDIX. 24i? 



New Madrid fragment he refers provisionally to the 

 same. 



MitchiWs Fossil Walrus. 



Dr. Mitchill has received from the shores of Long 

 Island, a very interesting skull belonging to a spe 

 cies of the genus Trichecus. This skull is agatised 

 and in a fine state of preservation. It has been re 

 ferred to the examination of a committee of the Ly- 

 ceum, and their report will be found in the 2d vol 

 yme of the annals of that excellent Institution. 



