36 ANNUAL REPORT OF THE 



REPORT ON THE COELENTERATES. 



By Henry B. Bigelow. 



The most important accession received during the past year is 

 a series of slides of British hydroids, representing 53 species, 26 

 of which are new to the Museum collection. Other accessions 

 are a small, but interesting series of Medusae from the Arctic 

 Ocean near Point Barrow, presented by Mr. J. M. Jessup; the 

 duplicate series of Medusae and hydroids collected by the Gram- 

 pus during the summer of 1912; a series of hydroids collected by 

 Mr. W. F. Clapp on George's Bank, and a few hydroids and Medusae 

 from the same region, obtained by Mr. Dowthart, of the Bureau of 

 Fisheries ; a large series of a few species of Medusae obtained near 

 Gloucester by Mr. W. W. Welsh, of the Bureau of Fisheries, and 

 a few ctenophores from San Diego, Cal., presented by Dr. C. O. 

 Esterly. 



A large collection of plankton from the Gulf of Maine has been 

 loaned for study by the United States National Museum. 



During the year the hydroids have been reidentified, rearranged, 

 and added to the card catalogue. 



During the winter I was occupied with the report on the oceanog- 

 raphy and plankton of the cruise of the Grampus in the Gulf of 

 Maine last summer. 



Through the courtesy of the United States Bureau of Fisheries 

 I was enabled to occupy stations in Massachusetts Bay, with the 

 steamer Blue Wing, bimonthly from November until April, at 

 which temperatures, water samples, and tows were taken. 



In the spring the cooperation of Capt. John McFarland, of the 

 schooner Victor was enlisted in oceanographic work, and since 

 that time he has collected a considerable number of water and 

 plankton samples. 



From July 7 until August 15, I was again in charge of the U. S. 

 Fisheries Schooner Grampus, on an oceanographic cruise, from 

 Nova Scotia to the Chesapeake, accompanied by Mr. W. W. 

 Welsh as assistant. As last year, the work consisted in taking 



