256 BULLETIN 17 8, UNITED STATES NATIONAL MUSEUM 



t Castor subauratus shastensis Taylor. 



Univ. California Publ. Zool. 12 : 433, Mar. 20, 1916. 

 =Castor canadensis shastensis Taylor. See Grinnell, Univ. California Publ. 

 Zool. 40 : 166, Sept. 26, 1933. 



50978. Skull only. Adult male. Cassel, Pit River, Shasta 

 County, Calif. January 3, 1893. Collected by H. E. Williams. 

 Skull Grade A. 



Family CHINCHILLIDAE: Chinchillas 

 Genus LAGOSTOMUS Brookes 

 *Lagostomus maximus petilidens Hollister. 



Proc. Biol. Soc. Washington 27:58, Mar. 20, 1914. 

 172801. Skull only. Adult [male]. 8 miles north of Carmen de 

 Patagones, Rio Negro Terr., Argentina. 1910. Collected by 

 Ales Hrdlicka. 

 Skull Grade A. 



Family CRICETIDAE: Cricetine Rats, Mice 



Genus AKODON Meyen 



*Akodon chacoensis Shamel. 



Journ. Washington Acad. Sei. 21 : 427, Oct. 19, 1931. 

 236239. Skin and skull. Adult male. Las Palmas, Chaco, Argen- 

 tina. July 20, 1920. Collected by Alexander Wetmore. Orig- 

 inal number 1059. 



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



*Akodon surdus Thomas. 



Smithsonian Misc. Coll. 68 (4) : 2, Apr. 10, 1917. 

 194663. Skin and skull. Adult male. Huadquina, altitude 5,000 

 feet, Peru. October 28, 1915. Collected by Edmund Heller. 

 Original number 835. 



Well-made skin in good condition except for small bare spot on belly ; 

 skull Grade A. 



*Microxus torques Thomas. 



Smithsonian Misc. Coll. 68 (4) : 3, Apr. 10, 1917. 

 =Akodon torques (Thomas). See Thomas, Ann. Mag. Nat. Hist (ser. 9) 



19: 370, Mar. 1927. 

 194607. Skin and skull. Adult male. Matchu Picchu, altitude 

 12,000 feet, Peru. May 28, 1915. Collected by Edmund Heller. 

 Original number 276. 



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



