84 REPORT OF NATIONAL MUSEUM, 1921, 
carats. A cut topaz weighing 92.4 carats was received as a loan 
from Mrs. George P. Merrill. 
The principal addition to the petrological collection is the ex- 
tensive and valuable series comprising upward of 300 hand speci- 
mens of igneous rocks from the islands of the Pacific and Indian 
Oceans, collected by the late Dr. Joseph P. Iddings and presented 
by his sister, Mrs. Francis D. Cleveland, of Cambridge, Mass. These, 
one regrets to state, have not as yet been fully described. Several 
brief papers under the joint authorship of Drs. Iddings and 
Morely are sufficient to show their interest and importance, but it is 
evident much work upon them remains to be done. Including also 
the scientific portion of Dr. Iddings’s library, as well as valuable 
collections assigned to other departments, this is considered one of 
the most noteworthy accessions of the year. 
Other additions, received by transfer from the Geological Survey, 
consist of collections of rocks from the western New England and 
eastern New York lime belt, collected by Prof. T. Nelson Dale, and 
miscellaneous rocks from Montana, Colorado, and Washington, col- 
lected by Messrs. Hancock, Pishel, and Beekley. 
The accessions in the section of invertebrate paleontology are of 
especial interest on account of the wide range of localities repre- 
sented. China, Australia, Tunis, Thrace, Java, Philippines, Hawaii, 
Trinidad, Jamaica, Haiti, Colombia, Argentina, Chile, and Bolivia 
are the most prominent of the foreign sources. 
Perhaps the most valuable of these foreign collections are the 
molluscan types from Bowden, Jamaica, described by W. P. Wood- 
ring and deposited by Johns Hopkins University, and important 
acquisitions of fossil invertebrates and plants collected in China by 
Prof. George D. Louderback, of the University of California. Large 
collections from Haiti, the result of surveys being made for the 
Haitian Government under the direction of the Geological Survey, 
through which institution they were presented by the Haitian Re- 
public, must also be mentioned, as well as a valuable lot of Tertiary 
fossils from Australia, received as an exchange from the National 
Museum, at Melbourne. 
Additions to the Cambrian collections are comprised in three 
accessions. About 6,000 specimens, collected and studied by Secretary 
Walcott, were deposited by the Smithsonian Institution; approxi- 
mately 1,000 from the Upper Cambrian of Wisconsin, received as a 
gift from Dr. W. O. Hotchkiss, State geologist, were secured through 
the efforts of Dr. E. O. Ulrich to supplement the monographic studies 
by himself and Dr. C. E. Resser; and 332 specimens from Lancaster 
County, Pa., were presented by Dr. H. Justin Roddy, of Millers- 
ville, Pa. 
