88 REPORT OF NATIONAL MUSEUM, 1919. 



Dr. Max Ellis, University of Colorado, Boulder, Colorado, spent 

 seA'eral days examining the crustacean collections for discodrilid 

 worms. The parasites found have been referred to him for mono- 

 graphic report, to be published by the National Museum. Dr. E, W. 

 Shufeldt, of Washington, District of Columbia, spent several days in 

 the division selecting specimens of mollusks and crustaceans to be 

 photographed for use as illustrations for a series of popular articles. 

 Fifty or more specialists from the various branches of the United 

 States Department of AgTiculture, the Bureau of Fisheries, and the 

 Geological Survey have made personal calls, seeking assistance with 

 various phases of their respective problems. 



There are a large number of groups of marine invertebrates on 

 which the Museum, unfortunately, possesses no staff specialist. 

 Whenever material in these groups arrives for determination or de- 

 posit it is sent to men engaged in research upon these lines, and 

 while this arrangem.ent is undoubtedly also of advantage to these 

 coworkers, the Museum is nevertheless under great obligations to 

 them for their cordial and valuable cooperation. The list embraces 

 some of the highest authorities in their specialty in this country, 

 as well as abroad, as follows: Dr. Henry B. Bigelow (Medusae, 

 Ctenophora) ; Dr. L. R. Cary (Alcyonarians) ; Dr. R. V. Chamber- 

 lin (Gephyrea) ; Dr. Hubert L. Clark (Holothurians) ; Dr. Wesley 

 E. Coe (Nemerteans) ; Dr. Leon J. Cole (Pycnogonids) ; Dr. Joseph 

 A. Cushman (Foraminifera) ; Prof. G. S. Dodds (Fresh Water 

 Entomostraca) ; Dr. Max Ellis (Discodrilids) : Dr. C. O. Esterly 

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

 Ernest Carroll Faust (Trematodes) ; Dr. Walter K. Fisher (Star- 

 fishes) ; Dr. Maurice C. Hall (Discodrilids) ; Mr. Sanji Hozawa 

 (Calcareous sponges) ; Dr. A. G. Huntsman (Ascidians) ; Prof. Eene 

 Koehler (Ophiurans) ; Prof. Chauncey Juday (Daphniidae Crus- 

 taces) ; Dr. C. D wight Marsh (Free-swimming Copepods) ; Dr. 

 Alfred G. Mayor (Scyphomedusae) ; Dr. Maynard M. Metcalf 

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

 Dr. Theodor Mortensen (Echinoids) ; Dr. Charles C. Nutting (Ply- 

 droids) ; Dr. Eaymond 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 (An- 

 nelids) ; Dr. Willard G. Van Name (Ascidians) ; Dr. A. E. Verrill 

 (Starfishes); Prof. L. B. Walton (Planarians) ; Dr. Charles B. 

 Wilson (Parasitic Copepods). 



Several large collections were sent out to specialists mentioned 

 above, thus a large number of foraminifera to Dr. Joseph A. Cush- 

 man, of the Boston Society of Natural History, in connection with 



