1909.] SICISTA SUBTILIS IN NORWAY. 7 



4) between the posterior part of M2. an unbroken broad 

 ridge, which points forwards and there forms a sharp angle, 

 which reaches to the opening between the two last half- 

 ridges. 



5) between M3. an unbroken broad ridge, broadest in the 

 middle, pointed in front and behind. 



Some of these ridges may be broken up (on one or both 

 sides) into small tubercles. 



Height above the sea level. All the specimens were found 

 in the Sub-alpine or Alpine region at an altitude, ranging from 

 350 to 1030 Meters; none were found in the lowlands. Most 

 of them lived in that mountain zone, where the upper birch 

 woods give place to more open country, covered with Betula 

 nana and Salices. In Opdal, where the greatest number of 

 specimens was caught, the localities were from 650 to 700 

 Meters (2200 feet) above the sea level, a few up to 830 Meters 

 (2650 feet); all these are situated just under the western and 

 southern slopes of Troldheimen, with snow-clad peaks, 1500 — 

 1600 Meters in height, not far distant. 



The greatest height was inhabited by a specimen, found 

 Sep. 7 th 1909 just below Lyngkampen in the Øier Mountains 1 ), 

 at an altitude of 1030 Meters (about 3300 feet). 



The lowest place inhabited by any specimen hitherto obtained 

 was a sæter-valley 2 ) in Rennebo (Grindalen), situated on the north- 

 eastern slope of the Troldheimen mountain group. The height 

 was about 440 Meters (about 1400 feet). 



In Valders the locality was 460 Meters (1460 feet) above 

 the sealevel, but not far from the snow-covered mountains of 

 Jotunheimen in the north, Filefjeld to the west, and Hallingdals- 

 fjeldene to the south. 



*) Lyngkampen, whose height is 1185 Meters, is situated exactly on the 

 border line between the two districts Gudbrandsdalen (Øier), and Øster- 

 dalen (Siorelvedalen). 



2 ) A summer pasture among the mountains. 



