82 MIC ROTHS. 



Microtus mordax bernardinus Moniaiii. Biological Survey coll. 



Vniv. Hiol. Soc. Wash., XXI, p. 145, June 9, 1908. 

 150(»32. Skill and skull. Adult male. Dry Lake, San Bernardino 



Mountains, California; altitude 9,000 feet, at north base San Gor- 



gonio ]*eak, August 21, 11H)7. Collected by V. Bailey. Original 



nunit)er sT41>. 



Well-made skin in good condition; skull perfect. 



Microtus brachelix MIIKm'. 



Proc. Acad. Nat. Sci. Phila., 1899, p. 290, August 9, 1899. 

 63445. Skin and skull. Young adult female. Nagmarg, Kashmir; 

 i),000 feet. November 15, 1S95. Collected by Dr. W. L. Abbott. 

 Catalogued June 12, 1896. 



Well-made skin in good condition; skull originally much broken, y)ut glued 

 together so that it is nearly perfect except about the pterygoids. 



Arvicola breweri Baird. Cotypes. 



Mammals of North America, p. 525, 1857. 

 = Microtus breweri (Baird). See Miller, Proc. Bost. 8oc. Nat. Hist., XXVII, 

 p. 83, June, 1896. 



No particidar specimen is designated by Baird as tiie type and ther« 

 is nothing to sho^Y that any one of the six specimens given in his 

 list should be taken as such. Consequently all six listed become 

 cotypes. The}' were collected in Jul}', 1856, on Muskeget Island, 

 Massachusetts, b}' Dr. T. M. Brewer. Catalogued Ma}' 31, 1857. 

 The specimens are as follows: 

 282s. Adult male in alcohol; in good condition. 

 2829. Adult male in alcohol; can not be found. 

 |i]i|. Adult female. Skin and skull. 



Skin poorly made, but well preserved, except for two spots devoid of hair on 

 side. Skull (luite i)erfect, excei)t pterygoids; right half of mandible lost, 

 lit 1. Adult male. Skin and skull. 



Skin poorly made, but well preserved. Skull lack.-^ the right tympanic, peri- 

 otic, and mastoid bones and the right half of mandible. 

 Ilio- luunature male. Skin and skull. 



Skin can not now be found. Skull j)resent. Both malars and posterior half 

 of l)rain case missing. Two extra molars present, perhaps belonging to the miss- 

 ing lower jaws of the two ])receding. 

 2833. Specimen in alcohol; can not now ])e found. 



Arvicola californica Peale. 



U. S. lOxploring lOxpedition, Mammalia and Ornithology, p. 46, 1848. 

 = Microtus californicus (Peale). Sec Troucssart, Catalogus Mammalium, p. 563, 

 1897. 



V'tVc"' Skin and skull. Vicinity of San Francisco Bay, California. 

 Collected by T. R. IVale. U. S. Exploring Expedition from 1838 

 to 1842. Skin catalogued 1872; skull, i860. 



