70 EEPORT OF NATIONAL MUSEUM, 1023. 



completed, this work will cover several volumes. It is largely based 

 upon the collections obtained by the American Museum Expedition 

 of the TJ. S. Fisheries Steamer Albatross to the Gulf of California, 

 in 1911, on which expedition Doctor Bartsch was present and 

 stressed the gathering of material from this region. The work, 

 however, will not be confined to this alone, but will embrace all the 

 material in the National Museum collection, as well as that pre- 

 viously treated. The fraction of time remaining was given to a 

 continuation of the work begun in previous years on the small East 

 American marine mollusks of the genera Trijyhora, Bittium, Cerithi- 

 opsis, and Metaxia and upon mollusks of the family Vitrinellidae, 

 the Philippine Nudibranch mollusks, the West American Caecidae, 

 the land mollusks of the Windward and Leeward Group, the Philip- 

 pine land mollusks, especially the Heimglyptas^ and with Mr. Hen- 

 derson the mollusks of the Beaufort, N. C, region. William B. 

 Mai-shall, assistant curator, although most of his time of necessity is 

 taken up largely with labeling, registering, identifying, and dis- 

 tributing specimens, nevertheless was able to make examinations of 

 the microscopic details of several hundred species of pearly fresh 

 water mussels of all genera and from all parts of the world. The 

 results will be embodied in a short paper drawing attention to some 

 interesting discoveries made. Dr. Charles Wardell Stiles, custodian 

 of the helmintheological collections, and Dr. B. H. Kansom, assist- 

 ant custodian, have continued their study of the parasites of man 

 and other animals. Dr. T. Wayland Vaughan, custodian of madre- 

 porarian corals, has worked on the recent corals. 



During the past year the efforts of Austin H. Clark, curator of 

 echinoderms, have been directed chiefly toward the completion of 

 part 3 of Bulletin 82 which will include the systematic description 

 of the Comatulid crinoids. The greater part of the work has now 

 been completed, and the manuscript of about half of it, amounting 

 to something over 1,000 pages, is in final form and ready for publi- 

 cation. The report upon the crinoids of the Danish Ingolf expedi- 

 tion was completed and is now in press. 



The special investigations begun or continued in the division of 

 plants during the year are as follows: Dr. Frederick V. Coville, 

 curator, has continued his studies in breeding and propagation of the 

 blueberries (Vaccinium), and has, as usual, made frequent use of 

 the herbarium. Dr. J. N. Kose, associate curator, has continued his 

 studies of the Cactaceae, in cooperation with Dr. N. L. Britton, 

 Director-in-Chief of the New York Botanical Garden, an investiga- 

 tion which has been under way since 1911. The fourth and final 

 volume of their report upon the family is now in press, and will be 

 issued during the summer of 1923 by the Carnegie Institution of 



