CHAP. I. ] INTRODUCTION. Dey 
surface, and when they die their shells settle to the 
bottom.’ 
The next high authority who expressed an opinion 
was Professor Huxley, and he was very guarded. ‘The 
samples procured by Capt. Dayman in the ‘ Cyclops,’ 
Fic. 3.—Orbulina universa, D’ORBIGNY. Highly magnified. 
in 1857, were submitted to him for examination, and 
in his report to the Admiralty’ in 1858 he says :— 
1 Explanations and Sailing Directions to accompany the Wind and 
Currents Charts. By M. F. Maury, LL.D., Lieut. U.S.N., Super 
intendent of the National Observatory. 6th Edition. Philadelphia, 
1864. P. 299. 
2 Appendix A to Deep Sea Soundings in the North Atlantic Ocean 
between Ireland and Newfoundland, made in H.M.S. ‘ Cyclops,’ 
Lieut.-Commander Joseph Dayman, in June and July 1857. Pub- 
lished by order of the Lords Commissioners of the Admiralty. 
London, 1858. 
