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 

 moUuscan 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. Louclerback, 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. Eesser; and 332 specimens from Lancaster 

 County, Pa., were presented by Dr. H. Justin Roddy, of Millers- 

 ville. Pa. 



