36 REPORT OF NATIONAL MUSEUM, 1910. 
A monograph of the molluscan fauna of the northwest coast of 
America, for which Dr. Dall has been gathering specimens and 
data for 45 years, has now been taken up, the material having accumu- 
lated and been arranged to such an extent as to permit of its being 
systematically studied. Dr. Dall completed a review of the genus 
Conus as represented on the west coast of America and conducted 
various minor investigations on the land shells of Mexico and Peru. 
Dr. Paul Bartsch continued his work on the east African collection 
of Col. Turton, which has been interrupted by other duties but 
will now soon be finished. He also wrote a few short papers on 
small west American species. The monograph of the Pyramidellid 
mollusks of the west coast of America, by Messrs. Dall and Bartsch, 
the completion of which was announced in the last report, was 
issued as a bulletin in December, 1909. As an instance of the 
stimulation such publications afford to research in the line to which 
they relate, it may be mentioned that, since the distribution of the 
work, some 25 new species not included in it have been discovered 
and forwarded to the Museum by west coast collectors. 
Dr. T. Wayland Vaughan, of the Geological Survey, the Hon. 
T. H. Aldrich, of Birmingham, Alabama, and Miss Julia Gardner, 
of Johns Hopkins University, have had free access to the collections 
for the prosecution of their paleontological investigations on the 
Tertiary formations of the eastern United States. Mr. G. D. Hanna, 
of the Geological Survey, conducted researches on the anatomy 
of the small land shells of the District of Columbia and of some 
Philippine marine shells, which were made the subject of a paper. 
Mr. J. B. Henderson, jr., of Washington, spent much time at the 
Museum working up the marine mollusks from off the southeastern 
coast of the United States, where he has made extensive deep sea 
collections by dredging. Miss M. C. Breen continued her studies 
of the mollusks of the District of Columbia, spending one or two 
days each week during the greater part of the year with a view 
to preparing a thesis for a doctorate degree. Dr. H. A. Pilsbry, 
Mr. Bryant Walker, Mr. H. W. Clapp, and Mr. F. N. Balch consulted 
the collections at various times. The demands on the division 
from correspondents for the identification of specimens have been 
especially great. 
Marine invertebrates—Among the accessions to the division of 
marine invertebrates were several important transfers from the 
Bureau of Fisheries, as follows: Ophiurans, or brittle stars, to the 
number of over 7,000 specimens, from the cruises of the steamer 
Albatross in Japanese waters in 1900 and 1906, identified by Dr. 
Hubert Lyman Clark, and constituting part of the material used by 
him in preparing the monograph of the North Pacific Ophiuroidea now 
being published by the Museum; 20 species, represented by 235 
