94 REPORT OF NATIONAL MUSEUM, 1920. 



Wesley R. Coe (Nemerteans), Dr. Leon J. Cole (Pycnogonidas). Dr. 

 Joseph A. Cushman (Foraminifera), Prof. G. S. Dodds (Freshwater 

 Entomostraca), Dr. Max Ellis (Discodrilids) , Dr. C. O. Esterly 



(Free-swimming Copepods), Dr. Walter Faxon (Crayfishes), Prof. 

 Ernest Carroll Faust (Trematodes), Dr. Maurice C. Hall (Discodri- 

 lids), Mr. Sanji Hozawa (Calcareous sponges), Dr. A. T. Huntsman 

 (Ascidians), Prof. Cliauncey Juday (Daphniidae), Dr. C. Dwight 

 Marsh (Free-swimming Copepods), Miss Ruth Marshall (Water- 

 mites), Dr. Alfred G. Mayor (Scyphomedusae), Dr. Maynard M. 

 Metcalf (Salpa and Pyrosoma), Dr. J. Percy Moore (Annelids, 

 Leeches), Dr. Charles C. Nutting (Hydroids), Dr. Raymond C. 

 Osburn (Bryozoa), Dr. Henry A. Pilsbry (Barnacles, Mollusks), 

 Mr. Madoka Sasaki (Cephalopod Mollusks), Prof. Frank Smith 

 (Earthworms), Dr. Victor Sterki (Sphaeriidae), Prof. Harry B, 

 Torrey (Actinians), Dr. Aaron L. Treadwell (Annelids), Dr. Wil- 

 lard G. Van Name (Ascidians), Prof. L. B. Walton (Planarians). 

 Dr. Paul Welch (Enchytraeidae), Dr. Charles B. Wilson (Parasitic 

 Copepods). 



The study of the tertiary fossil mollusks is so closely connected 

 with that of recent ones that the paleontologists of the Geological 

 Survey are spending much time in studying the latter in our collec- 

 tions. Thus Dr. C. W. Cook spent several months in the division 

 consulting the recent mollusk collections in connection with his 

 studies of the Eocene and Oligocene faunas, continued in the inter- 

 vals of field work for the Geological Survey. Dr. W. P. Woodring 

 has spent the greater part of the year in the division consulting the 

 recent mollusk collections in connection with his studies of the 

 Miocene faunas of Jamaica and of the Dominican Republic. Dr. 

 Julia A. Gardner has resumed her geological studies since her return 

 from France returning to her desk in the Museum in April, consult- 

 ing the recent mollusk collections in connection with her studies of 

 the Oligocene faunas. 



The assistance of specialists in the various subdivisions of the 

 echinoderms has been similarly taken advantage of as in the other 

 marine invertebrates, and various Museum collections are in their 

 hands. The more notable are: Dr. Hubert Lyman Clark (Philip- 

 pine Holothurians) , Dr. Thcoclor Mortensen (Philippine Echinoids), 

 Dr. Joseph Pearson (East Indian Holothurians), Prof. Walter K. 

 Fisher (North Pacific Starfishes), Prof. Addison E. Vcr^ill (various 

 Starfishes). 



During the year the National Herbarium has been consulted fre- 

 quently, as heretofore, by many members of the scientific staffs of the 

 Department of Agriculture, Dr. S. F. Blake and Mr. C. V. Piper, of 

 the Bureau of Plant Industry, having given considerable time to 

 critical work upon several groups. 



