MICROTUS. 89 



Arvicola (Mynomes) nanus Merriani. Biological Survey collet'tion. 



North AiiHM-. Fauna, No. r>, pp. 62-63, pi. 2, figs. 5-6, July 30, 1891. 



= Microtus nanus (Alcrriani). f^ee Miller, Proc. Biol. Soc. Wash., XI, p. 67, 

 April 21, 1897. 



Ifllf. Skill and skull. Adult female (not male, as in original 

 description). Pahsimeroi Mountains, Idaho, September 1(>, 1890. 

 Collected by Dr. C. Hart Merriam and V. Bailey. Orioinal number 

 1809. 



Well-made skin in good condition; skull perfect. 



Microtus pinetorum nemoralis Bailey. Biological Survey collection. 

 Proc. Biol. Soc. Wash., XII, pp. 89-90, April 30, 1898. 



87246. Skin and skull. Adult female. Stilvvell, Boston Mountains, 

 Oklalioma. April T, 1897. Collected by J. A. Loring. Original 

 luunber 3905. 



Well-made skin in good condition; skull perfect. 



Microtus nevadensis Baile}'. Biological Survey collection. 



Proc. Biol. Soc. Wash., XII, i)p. 86-87, April 30, 1898. 



Ifl^ !• Skin and skull. Adult male (not female, as in original descrip- 

 tion). Ash jNleadows, IVye County, Nevada. March 2, 1891. Col- 

 lected bv E. W. Nelson. Original number 577. 



Well-made skin in good condition; skull perfect, f^xcept for broken audital 

 bulLe and left coronoid process. 



Arvicola occidentalis Peale. 



r. 8. Exploring Expedition, Mammalia and Ornithology, p. 45, 1848. 



= Microtus townsendi ( Bachman). See Bailey, North Amer. Fauna, No. 17, p. 46, 

 June 6, 1900. 



VVsV' Skin and skull. Puget Sound, Washington. U. S. Exploring 

 Expedition, 1838 to 1842. Collected by T. R. Peale. Skin cat- 

 alogued 1872; skull, 1860. 



Poorly made skin, tail not skinned out. It has somewhat tlie look of having 

 been in alcohol at one time. Some of the hair has slipped from each side, 

 esjjecially the right. Skull fairly good for an old specimen; right zygoma miss- 

 ing and both bullic and both pterygoids broken, coronoid proce.<s of right half 

 of mandil)le broken. 



Type not designated by number. In the entry of the skin in 1872 (twelve 

 years after the skull was entered in the catalogue) under the remarks column is 

 written, in the handwriting of the original entry, "type of occidentalis." On 

 page 535 of Mammals of North America, Baird speaks of having the original 

 specimen. One of Doctor Coues's labels is attached marke<l "Monograph of 

 American Murid;e. Dr. Elliott Coues, U. S. A. No. 10083. Type of Arvicola 

 ' ocridoitdlis' Peale." In the table on page 173, iMonogra[)hs of North Ameri- 

 can Kodentia, Doctor Coues has 10083 marked as the type of " occidenltUin." 



