REPORT OF NATIONAL MUSEUM, 1921. 59 
Returning to the pampas in the Province of Buenos Aires, he later 
proceeded to northern Patagonia. In January, 1921, he crossed to 
Montevideo, studying and collecting in Uruguay until the end of 
February, when he returned to Argentina, extending his explora- 
tions west to the foothills of the Andes. Crossing the Andes into 
Chile he returned from there to New York by way of the Panama 
Canal. Over 2,500 specimens of mammals and birds were brought 
home by Doctor Wetmore, besides reptiles and lower animals. A 
feature of his collection of particular importance is that, in addition 
to paying special attention to the main purpose of his expedition, he 
secured a large and valuable collection of anatomical material in 
the form of skeletons and alcoholics. 
Incidental to his geological explorations in Canada during 1920, 
Dr. C. D. Walcott, Secretary of the Smithsonian Institution, as usual 
had the museum’s need of good fresh material for the renewal of 
its large mammal groups in mind, and among other specimens col- 
lected two Rocky Mountain goats. 
During August and September, 1920, Dr. Paul Bartsch, curator of 
mollusks, was delegated by the State Department to attend the first 
Pan-Pacific Scientific Congress at Honolulu. He was accompanied 
by Mr. John B. Henderson. While the meeting of the congress con- 
sumed the greater portion of their time, they still found oppor- 
tunity to make a notable collection for the museum, among which 
were about 2,500 mollusks. These materially increase the value of 
our rapidly growing and exceedingly important collection of Ha- 
waiian mollusks, and are remarkable for the fact that fully 80 lots 
contain few or no duplicates of Hawaiian material already in the 
collection. Reestablishing the heredity experiments which are being 
carried on under the joint auspices of the Smithsonian and Carnegie 
Institutions and which were interrupted by the hurricane in 1919, 
Doctor Bartsch, during a period of about six weeks in May and June, 
1921, visited the Bahamas to secure new stock materia] and then 
established a new set of cages for Cerions on Loggerhead Key, Tor- 
tugas, in which the heredity work is conducted. Incidentally, he se- 
cured a collection of about 20,000 Bahama Cerions and other mol- 
lusks, as well as other invertebrates and a few birds, reptiles, and 
amphibians. 
Excursions into South America by several experts connected with 
the Geological Survey resulted in the addition of noteworthy collec- 
tions of land and fresh-water mollusks, by Dr. C. Wythe Cooke, from 
Colombia, and Mr. George L. Harrington from Argentina, Bolivia, 
and Chile. 
Toward the end of the fiscal year it became possible to take ad- 
vantage of certain facilities offered over the Government railroad 
now under construction in Alaska and have Dr. J. M. Aldrich, asso- 
