Smithsonian Institution, 



U. S. National Museum, 



May 10, 1804. 



BULLETIN No. 42, U. S. NATIONAL MUSEUM. 



Errdtum. 

 Cancel Plate iii, and also tbe explanation of tbe same on Page xii. 



[This notice is sent to the recipients of Bulletin No. 42 of the U. S. National 

 Museum, in compliance with the receut request of the author, Mr. F. P. Dewey.] 



