672 LOUIS AGASSIZ, 



by the Coast Survey in later years. He had 

 long wished to show his old friend and teacher 

 some of the rich dredging grounds he had 

 discovered between Florida and the West In- 

 dies, and they thoroughly enjoyed this short 

 period of work together. Every day and hour 

 brought some new interest, and excess of ma- 

 terial seemed the only difficulty. 



This was Agassiz's last cruise in the Bibb, 

 on whose hospitable deck he had been a wel- 

 come guest from the first year of his arrival 

 in this country. The results of this expedi- 

 tion, as connected with the present conforma- 

 tion of the continent and its probable geolog- 

 ical history in the past, were given as follows 

 in the Museum Bulletin of the same year. 



EEPOKT UPON DEEP SEA DREDGmGS.^ 

 BY LOUIS AGASSIZ. 



From what I have seen of the deep-sea bot- 

 tom, I am already led to infer that among the 

 rocks forming the bulk of the stratified crust 

 of our globe, from the oldest to the youngest 

 formation, there are probably none which have 

 been formed in very deep waters. If this be 

 so, we shall have to admit that the areas now 

 respectively occupied by our continents, as 



1 Bull Mus. Comp. ZooL, I. No. 13, 1869, pp. 368, 369. 



