MUSEUM OF COMPARATIVE ZOOLOGY. 29 



observations made by the U. S. Coast Guard Steamer Seneca on 

 the international ice patrol off the Grand Banks, April-June, by 

 the observer, Mr. A. L. Thuras. Special mention should be made 

 of Mr. Thuras's perfection of an accurate and convenient ap- 

 paratus for determining the salinity of the sea water on ship 

 board by its electric conductivity. 



Since May my time has been occupied with the examination of 

 the Plankton collections of the Albatross. 



