80 REPORT OF NATIONAL MUSEUM, 1925 



specimen of Xenorophus sloani Kellogg, a beautifully preserved 

 skull. In addition, various cetacean and sirenian bones from the 

 Sooke formation, British Columbia, were presented by Ira E. Corn- 

 wall, Gordon Downes, and Rev. Robert Connell. These are impor- 

 tant in being the only cetacean remains thus far found in the Oligo- 

 cene of North America. 



Dr. David Starr Jordan, Stanford University, Calif., presented 

 remains of fish and other vertebrates from the Miocene deposits at 

 Lompoc, and a specimen, apparently representing a new fossil 

 species of ground squirrel, from Alaska, was contributed by Mike 

 Myntti. 



By purchase, were obtained a skull and lower jaws of a fossil 

 horse; a collection of fossil fishes from Chaleur Bay, Quebec, Can- 

 ada ; and a skull of an extinct rodent from a cave in Porto Rico. 



Explorations. — ^As noted previously in this report, important 

 material was secured by members of the staff, although no major 

 expeditions were undertaken under Museum auspices. 



During the latter part of the last fiscal year and the early months 

 of the present, Assistant Curator Foshag was engaged, in coopera- 

 tion with one of the United States Geological Survey field parties 

 in mapping the Hawthorne quadrangle in western Nevada. During 

 his special study of the mineralogy and ore deposits of the area, op- 

 portunity was afforded for making collections; for visiting various 

 mines ; and for making the acquaintance of mine owners and collec- 

 tors in the region, from all of which the Museum has benefited, and, 

 it is hoped, will benefit further in the future. Following this work, 

 and while in California on leave, Doctor Foshag collected a series 

 of minerals from near Riverside, Calif., which he presented to the 

 Museum. 



Several short trips were made by Mr. Shannon to various mines 

 and quarries in Maryland in cooperation with the Maryland Geo- 

 logical Survey in continuance of the work of preparing a report 

 on the mineralogy of that State. Through, a similar arrangement 

 with the Geological and Natural History Survey of Connecticut 

 three weeks were spent in a collecting trip in that State and some 350 

 specimens obtained. 



Details were granted to Doctor Foshag and Mr. Shannon at 

 various times for collecting in Maryland and Virginia, where mate- 

 rials of mineralogical and petrological interest were obtained as 

 well as a quantity of rocks with their weathered products for use 

 in the preparation of school sets illustrating rock weathering and 

 the formation of soils. 



The head curator while in Maine on his vacation last summer made 

 brief trips, whence materials noted in the accessions were obtained. 



