64 KEPORT OF NATIONAL MUSEUM, 1913. 



division. During last year these volunteer collaborators represented 

 11 different States of this country, besides Great Britain, France, 

 Germany, and Denmark. Reports for publication were received 

 from several of these, as follows: Dr. R. Koehler, of Lyon, France, 

 on a large collection of ophiurans chiefly from the West Indies; 

 Dr. H, B. Bigelow, of the Museum of Comparative Zoology, on the 

 Medusae and Siphonophorae collected by the steamer Albatross in the 

 northwestern Pacific Ocean in 1906; Dr. Walter Faxon, of the same 

 Museiun, on the crayfishes received by the Museum during the past 

 15 years or since his last report upon the subject; Dr. WilUam E. 

 Ritter, of the Scripps Institution for Biological Research, at La 

 JoUa, Cal., on the sunple ascidians from the northeastern Pacific 

 Ocean; Dr. Joseph A. Cushman, of the Boston Society of Natural 

 History, the third part, covering the family Lagenidae, of his mono- 

 graph of the foraminifera of the north Pacific Ocean; Dr. C. Dwight 

 Marsh, of the Department of Agriculture, on the fresh-water copepods 

 of Panama, based on material mainly collected by himself; and Dr. 

 A. S. Pearse, of the University of Wisconsin, on a collection of 

 amphipods from the Pribilof Islands, Alaska. 



The foUowmg important investigations, previously begun, were in 

 progress, namely, on the starfishes of the north Pacific Ocean, by 

 Dr. Walter K. Fisher, of Leland Stanford Junior University; on 

 parasitic copepods, by Dr. Charles B. Wilson, of the State Normal 

 School at Westfield, Mass.; on the sessile Cirripedia, by Dr. H. A. 

 Pilsbry, of the Academy of Natural Sciences of Philadelphia; on the 

 family Crangonidae of shrimps, by Dr. H. Coutiere, of the Ecole 

 Superieure de Pharmacie, Paris, France; on the order Euphausiacea 

 of crustaceans, by Dr. H. J. Hansen, of the Zoological Museum, 

 Copenhagen, Demnark; on the order Mysidacea of crustaceans, by 

 Dr. W. M. Tattersall, of the Manchester Museum, Manchester, Eng- 

 land; on the bryozoans of the Atlantic coast of North America, by 

 Dr. R. C. Osburn, of Barnard College, New York City; and on the 

 rotifers of the District of Columbia, by IVIr. Harry K. Harring, of the 

 Bureau of Standards. Other extended researches were taken up 

 during the year by Prof. Frank Smith, of the University of Illinois, 

 on the oligochete annelids; by Mr. R. Southern, of Dublin, Ireland, 

 on the family Cirratulidae of annelids; by Dr. J. W. Spengel, of 

 Giessen, Germany, on the genus Sipunculus of worms; and by Prof. 

 Maynard M. Metcalf, of Oberlin College, on the collection of Salpa 

 and P3rrosoma. Dr. H. B. Bigelow began the examination of the 

 many samples of plankton collected in the Gulf of Maine during the 

 summer of 1912 by the Bureau of Fisheries schooner Grampus. 



Acknowledgments are also due to the following persons for the 

 identification of specimens sent to them from time to time belonging 

 in the groups named respectively after each, namely. Dr. H. V. 



