8 



water Fauna have most probably been sketched out. It now 

 becomes extremely desirable to follow the course of the Gulf 

 Stream to the north of the Bahamas, and, by running normals 

 from the 100-fathom line to 2500 fathoms off the coast of the 

 United States, to connect this isolated district with the deep- 

 water Fauna proper of the Atlantic. This work, it is hoped, will 

 be accomplished during the coming summer, the Superintendent 

 of the Coast Survey having asked me to join the " Blake " for 

 this purpose on her return from her winter's cruise. 



ALEXANDER AGASSIZ. 



Cambridge, September, 1879. 



