34 ANNUAL REPORT OF THE 



ACALEPHS. 



By Henry B. Bigelow 



The most important accession is the duplicate set of siphono- 

 phores collected by the "Albatross" during her expedition to the 

 Eastern Tropical Pacific, 1904-1905. This series consists of 

 forty-four species, many of them not previously represented in 

 the Museum. Another collection only second to the foregoing 

 is the duplicate set of Medusae, siphonophores, and ctenophores 

 collected by the "Albatross" in the Philippines, and presented by 

 the U. S. bureau of fisheries. From the Australian Museum, 

 through the courtesy of the Curator, Mr. Robert Etheridge, a 

 valuable series of Australian Medusae has been received. Dr. 

 A. G. Mayer has presented a collection of Medusae, beautifully 

 preserved, from Newfoundland, and a series of Medusae, cteno- 

 phores, and hydroids was obtained by the Assistant in the Bay of 

 Fundy. A very large specimen of Physalia physalis has been 

 placed on exhibition. 



During the year the collection of siphonophores has been re- 

 arranged and reidentified, and a card catalogue, of 61 species, 

 about 3,035 specimens, prepared. This series is in an excellent 

 state of preservation and contains about three fourths of the 

 known species of siphonophores. 



During August, 1910, through the courtesy of Mr. Joseph S. 

 Bigelow, Jr., dredging and surface collecting was carried on by 

 Dr. Clark and the Assistant in the Bay of Fundy near Grand 

 Manan. During the past summer Mr. Bigelow again placed his 

 yacht at my disposal to test a newly-devised closing net for 

 horizontal towing. This apparatus is a combination of the 

 Petersen and Nansen principles, and proved eminently successful. 

 Temperatures were taken at various depths in Massachusetts Bay 

 and the Gulf of Maine, and water samples preserved for titration. 

 During the year I have finished the reports on the Eastern Pacific 

 siphonophores, and on the Philippine Medusae and ctenophores. 



