90 EEPORT OF NATIONAL MUSEUM, 1920. 



Mr. Waldo L. Schmitt, associate curator, has continued work upon 

 liis reports on the Macrura and Anomura of the American Museum 

 Congo Expedition, and the State University of Iowa Barbados- 

 Antigua Expedition. The various other minor researches of pre- 

 vious years have been continued as time has permitted. In addition, 

 studies have been undertaken upon a large collection of specimens of 

 the family Peneidae submitted to this Institution by the Australian 

 Museum for report, and at the same time the material belonging to 

 this same group contained in the Museum collections is being worked 

 up. His only report published during the year is that upon the 

 Schizopod Crustaceans of the Canadian Arctic Expedition. Mr. 

 William B. Marshall, assistant curator, in the time he has found 

 available has continued his study of the pearly fresh water mussels, 

 especially the Diplodons and Anodontites. His report on " Xew 

 species of fresh-water shells from Guatemala'' is now going through 

 press. Another on "Three new Naiaids from Uruguay" is com- 

 pleted, except for illustrations. Mr. C. R. Shoemaker, aid, has de- 

 voted the time available for research to working up and cataloguing 

 the unidentified collection of Amphipod crustaceans and incorporat- 

 ing it with the permanent collections. He has also determined the 

 various collections of Amphipods transmitted for report by various 

 institutions and individuals, in connection with which two reports. 

 '•The Amphipods of the Canadian Arctic Expedition** and "The 

 Amphipods of the Congo Expedition of the American Museum of 

 Natural History." are now going through press. Miss Pearl L. 

 Boone, aid, has continued her studies of the Isopods when oppor- 

 tunity offered, and completed a number of papers describing new 

 genera and species, now going through the press or ready for the 

 printer. She has also in preparation a paper entitled " Studies of 

 South American Isopods* 1 and a monographic report on the Cephalo- 

 pod mollusks of the Albatross Philippine Expedition. Dr. Charles 

 W. Stiles, Assistant Surgeon General and custodian of the helmin- 

 thological collections, Dr. B. H. Ransom, assistant custodian, and 

 Dr. P. E. Garrison. U. S. X., have continued their investigations on 

 the parasites of man and other animals. Dr. T. Wayland Vaughan. 

 custodian of Madreporarian corals, has devoted the major portion of 

 his time to geological researches in connection with which he has 

 consulted the recent coral collections of the U. S. National Museum. 

 Mr. Harry K. Hairing, custodian of Rotatoria, has continued his 

 studies of the rotifers of the District of Columbia and Wisconsin, 

 and other states. 



Mr. Austin H. Clark, curator of echinoderms, reexamined a 

 large part of the collection of Atlantic crinoids in connection 

 with his forthcoming report upon the crinoids of the Danish 

 Ingolf expedition, which will take the form of a treatise on the 



