44 REPORT OF NATIONAL MUSEUM, 1918. 



has in preparation monographs on the nudibranch mollusks of the 

 Philippines, on the Philippine operculate land shells, on the mollusks 

 of the Windward and Leeward Islands of the West Indies, and on the 

 Caeciidae of the west coast of America. His investigations of the 

 Bahama cerions planted on the Florida Keys for the Carnegie Institu- 

 tion were continued and the report thereon is also in preparation. In 

 connection with this work Dr. Bartsch spent about three weeks in the 

 Tortugas. Reports on the Haitian bird fauna, based on material se- 

 cured during his trip to that island last year, and another on the bird 

 rookeries of the Tortugas, were completed. In connection with the 

 war gas investigations of the Bureau of Mines, Dr. Bartsch also ren- 

 dered assistance. Dr. T. W. Vaughan, custodian of nuidreporarian 

 corals, though mostly engaged in studies of the fossil corals, devoted 

 some time to the recent forms, supervising their specific segregation 

 and registration. Dr. C. W. Stiles, custodian of the section of hel- 

 minthological collections, and Dr. B. H. Ransom, the assistant custo- 

 dian, continued their investigations on the parasites of man and 

 animals. Mr. Waldo L. Schmitt, assistant curator, completed a re- 

 port on the decapod Crustacea of the west coast of America, which is 

 now going through press. He brought nearly to completion a report 

 on the schizopods of the Canadian Stefansson expedition to the 

 Arctic, 1913-1916, and began the study of the hermit crabs of Japan, 

 as well as the macrura and anomura secured during the Albatross 

 cruise of 1904. Mr. Austin H. Clark, assistant curator, in addition to 

 continuing work on the Ingolf collection of crinoids and on the re- 

 maining part of the " Monograph of the existing crinoids," prepared 

 a report on the echinoderms of the Canadian Stefansson expedition 

 to the Arctic, 1913-1916, incorporating with it additional Arctic ma- 

 terial. 



Mr. William B. Marshall, assistant curator, devoted to the study 

 of the pearly fresh-water mussels such time as he had available for re- 

 search work, resulting in the preparation of two papers, one of which 

 was published during the year, and in the continuation of his studies 

 of the diplodons and anodontites for a monographic report. Mr. 

 C. R. Shoemaker, aid, gave special attention to the unidentified am- 

 phipods of the collection, and also nearly completed a report on the 

 amphipods of the Canadian Stefansson expedition to the Arctic, 

 1913-1916. Miss P. L. Boone, aid, in her study of the isopods, sub- 

 mitted two small papers now going through the press and has three 

 others nearly ready. Mr. John B. Henderson, who, as previously 

 mentioned in this report, transferred his splendid collection of West 

 Indian mollusks from his home to a room in the Museum, devoted the 

 greater portion of every day to the reclassification of the collection ; 

 continued his researches on the Antillean and East American marine 

 mollusks; and prepared a monograph on the East American scapho- 



