28 ANNUAL REPORT OF THE 



REPORT ON THE COELENTERATES. 



By Henry B. Bigelow. 



For accessions during the past year, the Museum is indebted to 

 Prof. G. H. Parker, series of Renilla from San Diego; the Cana- 

 dian Geological Survey, Medusae from British Columbia; Dr. 

 Thomas Barbour, Florida Medusae and Siphonophorae; Dr. H. J. 

 Van Cleave, Medusae from Puget Sound. 



The Autumn was spent in completing the reports on the Cana- 

 dian Arctic Medusae, and on the "Grampus" Cruises of 1916. 



From the middle of February till the end of May, I was in charge 

 of explorations of the U. S. Fisheries Steamer Albatross, com- 

 mander L. H. Wallace, U. S. N., commanding, in the Gulf of 

 Maine and adjacent waters. Sailing from Norfolk, February 19, 

 the Albatross proceeded to Boston, where I joined her, making, 

 en route, a series of trawl hauls along the outer edge of the con- 

 tinental shelf, and a section across the western end of Georges 

 Bank. A general hydrographic survey of the Gulf of Maine, 

 Georges Bank, and the Continental Shelf south of Cape Sable, 

 Nova Scotia, was carried out during March, and repeated in April 

 to follow the seasonal changes. During the first half of May, the 

 Albatross worked a third set of stations in the western side of the 

 Gulf of Maine, besides conducting a series of experiments on the 

 flotation of the eggs of the haddock; ran a second section across 

 the west end of Georges Bank, and finally returned to Norfolk. 



Thanks to the efforts of Commander Wallace, his officers and 

 men, our cruises proved very successful. Notwithstanding the 

 stormy weather to be expected in early spring, we worked 89 

 stations, took 436 temperatures at serial depths, collected 418 

 water samples, the salt content of which has since been determined, 

 and made 360 hauls with the various nets. One full tidal record 

 with the Ekman Current Meter was obtained. 



As in past years, I have had general supervision of the scientific 



