MICROTUS 717 



narrowness of the loop, but more especially to the form of the 

 postero-external salient angle, which is usually narrow and 

 sharply pointed, and rarely, if ever, except in immature 

 individuals, obsolete. 



Measurements. — External measurements of adult male from 

 Chamonix, Haute-Savoie, France : head and body, 139 ; tail, 71 ; 

 hind foot, 20. Two adult males from the Furka Pass, 

 Switzerland: head and body, 127 and 133; tail, 63 and 68; 

 hind foot, 19 • 6 and 19. Two adult females from the same 

 locality: head and body, 126 and 131; tail, 72 and 69; hind 

 foot, 20 and 20 ; ear, 15. Adult male from Santis, Appenzell, 

 Switzerland : head and body, 126 ; tail, 70 ; hind foot, 20 ; 

 ear, 15. Adult male from Valasco, Valle del Gesso, Cuneo, 

 Italy: head and body, 132; tail, 74; hind foot, 21; ear, 17. 

 Adult female from Monte Cimone, Modena, Italy : head and 

 body, 120; tail, 63; hind foot, 20. For cranial measurements 

 see Table, p. 720. 



Specimens examined. — Sixty-two, from the following localities : — 



France : Chamonix, Haute-Savoie, 2 (U.S.N.M.). 



Switzerland : Sangloz, Vaud, 2 (U.S.N.M.) ; Eusannaz, Vaud, 2 

 (U.S.N.M.) ; Zermatt, Valais, 3 (U.S.N.M.) ; Murren, Berne, 2 ; Meiringen, 

 Berne, 2 ; Purka Pass, Uri, 11 (B.M. and U.S.N.M.) ; St. Gothard, Uri, 4 ; 

 Andermatt, Uri, 5 (U.S.N.M.) ; Goschenen, Uri, 6 (U.S.N.M. and Mottaz) ; 

 Santis, Appenzell, 12 (U.S.N.M.) ; Meglis Alp, Appenzell, 2 (U.S.N.M.) ; 

 Hochmattli, Murgsee region, St. Gallen, 2 (U.S.N.M.) ; Oampfer, Grisons, 1 

 (Bothschild) ; no exact locality, 2. 



Germany : Oberstdorf , near Sonthofen, Allgau, Bavaria, 2. 



Italy: Valasco, Valle del Gesso, Cuneo, 1 (Genoa); Monte - Cimone, 

 Modena, 1. 



2. Murren, Berne, Switzerland. W. Gurtner (c & p). 92.10.5.10-11. 



2. Meiringen, Berne. Tomes Collection. 7. 1. 1. 143-144. 



7 6, 9. Purka Pass, Uri. (E. H. O. Thomas (p). 2. 8. 4. 43-47. 



Zollikofer.) 4. 4. 5. 54-56. 



1. St. Gothard, Uri. Baron E. de Selys- 45. 7. 5. 3. 



Longchamps (p). 



2. St. Gothard, Uri. Purchased (Brandt). 45. 11. 1. 6-7. 

 1. St. Gothard, Uri. Stockholm Museum 46. 6. 2. 67. 



(e). 

 S. Switzerland. (MSschler.) E. K. Alston (p). 79. 9. 25. 50. 



1. Switzerland. Purchased (Parreys). 46.6.15.58. 



9 al. Monte Cimone, Modena, Modena Museum (p). 3. 2. 22. 1. 

 Italy. (Dr. Major.) 



MlCKOTUS NIVALIS AQUITANIUS Miller. 



1908. Hicrokis nivalis aquitanius Miller, Ann. and Mag. Nat. Hist., 

 8th ser., I, p. 99, January, 1908. Type in British Museum. 



1910. Microtus (Chionomys) nivalis aquitanius Trouessart, Paune Mamm. 

 d'Europe, p. 184. 



Type locality. — Near l'Hospitalet, Ariege, France. Altitude 

 about 4800 feet. 



Geographical distribution. — Pyrenees ; at present known from 

 the French side only. 



