KEPOBT OF NATIONAL. MUSEUM, 1924 61 



with new species and technical problems concerning the classification 

 of this interesting group. Dr. W. M. Mann has continued his study 

 of the ants secured by the Mulford Biological expedition. 



Dr. Mary J. Rathbun, associate in zoology, although she devoted 

 most of the time during the past year to a study of fossil crusta- 

 ceans, found leisure to prepare a report on the brachyuran crabs 

 collected by the Williams Galapagos expedition, 1923, besides de- 

 scribing a number of new species. Dr. Waldo L. Schmitt, curator of 

 marine invertebrates, completed four reports on macruran, anomu- 

 ran, and stomatopod crustaceans collected by Dr. van der Horst in 

 Curagao, by the American Museum Congo expedition, the Univer-- 

 sity of Iowa Barbados-Antigua expedition, and the Williams Gala- 

 pagos expedition. Only the latter has as yet been published. Work 

 upon the material of the Albatross 1911 expedition to the Gulf of 

 California has been continued as demands of other duties have per- 

 mitted. Besides his various curatorial duties Clarence R. Shoe- 

 maker, assistant curator, has continued his studies upon the amphi- 

 pods of the Cheticamp expedition of the Biological Board of Can- 

 ada, while a report on the amphipods of the Albatross 1911 expedi- 

 tion, and a paper on the amphipocl family Bateidae have been sub- 

 mitted for publication. Owing to the exigencies of the curatorial 

 work, J. O. Maloney, aid, has been obliged to devote nearly all his 

 time to routine work. Dr. Harriet Richardson Searle, collaborator, 

 has continued studies on several collections of undetermined isopods. 

 Prof. Max M. Ellis, of the University of Missouri, collaborator, 

 has carried on his studies on the North American Discodrilid collec- 

 tions. H. K. Harring, custodian of rotatoria, has continued his 

 studies in preparation of a monograph on the American rotifers. 



Dr. William H. Daii, honorary curator of mollusks, has been en- 

 gaged in original investigations as follows : He completed the report 

 on marine shells dredged off the coast of Florida by the U. S. 

 steamer Albatross in 1885-86. This is ready for publication when 

 illustrations are finished. He prepared a paper, including illustra- 

 tions of many unfigured types of shells in the National Museum, 

 comprising 36 plates, with appropriate references. This is completed 

 and has been submitted to the National Museum for publication. 

 Doctor Dall has completed the index to The Nautilus, volumes 1 to 

 34:. This work was begun a number of years ago by Miss Marguerite 

 Woodward who, while in Mr. Henderson's employ, used odd times to 

 prepare the individual slips. Doctor Dall has done the tremendous 

 work of assembling and editing these records, which embrace more 

 than 69,000 entries. Dr. George H. Clapp, of Pittsburgh, Pa., has 

 generously met the expenses of transcribing the sheets. See also 

 Doctor Dall's bibliography for his lesser contributions. 



