280 BULLETIN 17 8, UNITED STATES NATIONAL MUSEUM 



Type uot designated by number. In the entry of the skin in 1872 (12 

 years after the skull was entered in the catalog) the remarks column con- 

 tains, in the same handwriting as the original entry, the note : "type of 

 occidental is." On page 535 of Mammals of North America, Baird speaks 

 of having the original specimen. One of Coues's labels is attached marked 

 "Monograph of American Muridae. Dr. Elliott Cones, U. S. A. No. 10083. 

 Type of Arvicola 'occidentalism Peale." In the table on page 173, Monographs 

 of North American Rodentia, Coues has No. 10083 marked as the type of 

 "occidentalis." 



*Arvicola operarius Nelson. 



Proc. Biol. Soc. Washington 8: 139, Dec. 28, 1893. 

 ==[Microtus] operarius (Nelson). See Trouessart, Catalogus Mammalium tarn 

 Viventium qnam Fossilium, p. 564, 1897. 



^^^. Skin and skull. Adult. St. Michael, Norton Sound, Alaska. 

 22225 ' ' 



November 1879. Collected by E. W. Nelson. Original number 



122. 



Skin well preserved, but poorly made up, and right foreleg missing. Skull 

 Grade A. 



fMicrotus operarius endoecus Osgood. 



North Amer. Fauna 30 : 23, Oct. 7, 1900. 

 128327. Skin and skull. Adult male. Mouth of Charlie Creek, 

 Yukon River, about 50 miles above Circle, Alaska. June 21, 1903. 

 Collected by W. H. Osgood. Original number 236G. 

 Well-made skin in good condition ; skull Grade A. 



fMicrotus oregoni adocetus Merriam. 



Proc. Biol. Soc. Washington 21 : 145, June 9, 1908. 

 137995. Skin and skull. Adult male. South Yolla Bolly Moun- 

 tain, Tehama County, Calif. July 30, 1905. Collected by A. S. 

 Bunnell. Original number 135. 



Well-made skin in good condition ; skull Grade A. 



fMicrotus oregoni cantwelli Taylor. 

 Journ. Mamm. 1 (4) : 180, Aug. 24, 1920. 

 232814. Skin and skull. Adult male. Glacier Basin, altitude 5,935 

 feet, Mount Rainier, Pierce County, Wash. August 13, 1919. 

 Collected by George G. Cantwell. Original number 1487. 

 Well-made skin in good condition ; skull Grade C. 



*Microtus paitiirensis Miller. 



Proc. Acad. Nat. Sci. Philadelphia 51 : 287, Aug. 9, 1899. 

 62161. Skin and skull. Adult male. Tagdumbash, altitude 12,000 

 feet, Pamir, Central Asia. June 18, 1894. Collected by W. L. 

 Abbott. 



Well-made skin in good condition ; skull Grade A. 



