28 H. MØLHOLM HANSEN 
TABEL 5. Distribution of the Species Groups in Iceland. 
n A E | A3 | A2 | A1 | E4 | E3 | E2 | El 
SOUDE APRES RARE | 28 | 78.6 | 21.4 | 57.1 | 10.7 |10.7117.9| 3.6| » 
sl IR | 20 | 85.0 | 15.0 | 65 0 10.0 | 10.0 | 15.0 » > 
ADDON ee | 281182.1 | 17.957.1| 14.3 |10.7114.3| 36| »| > 
ST EN RAT Le | 26188.5|11.51654|11.5|11.5|115| >| »| » 
LE TER | 65 80.0 | 20.0 | 44.6 24.6 | 10.8] 18.5| 1.5 il iat 
(EAT RE | 91] 73.6 | 26.4 || 35.2 | 25.3 | 13.2120.9| 4.4] 11] > 
BE Bree Saye sch: | 117 | 69.2 | 30.8 || 29.1 | 28.2 | 12.0 | 19.7} 6.8] 3.4] 0.9 
Be OU) er es. 161 59.6 |40.4 23.6 24.8 11.2 18,6 13.0) 7.5) 1.2 
ADD en eee eee NE) | 204 49.5 | 50.5) 19.6 20.1 9.8| 18.6 | 15.2| 13.7] 2.9 
RE teen eet | 126 57.9 | 42.1] 21.4 | 25.4 11.1] 21.4) 14.3] 5.6) 0.8 
MAR tee ie oe eos oe | 166 | 50.6 | 49.4 | 18.7 | 20.4 | 11.4) 19.3 16.3) 11.4) 2.4 
East lceland. .......2...... 272 \45.2 54.8 16.5 | 17.3 | 11.4 | 16.9 | 17.3 | 13.2| 7.4 
Northuleeland...2..2.0..0.%- | 331|44.4 | 55.6 16.3 | 15.1| 13.0 | 17.2 | 15.1 | 13.0-/ 10.3 
VÆS BAT ODDER ee: 277 | 43.7 | 56.3] 15.5 | 15.9 | 12.3 | 18.1 | 16.6 | 14.4| 7.2 
South-West Iceland ........ 314 | 40.4 59.6 | 13.7 | 14.3 | 12.4 | 16.9 | 16.2 | 14.0 | 12.4 
South Iceland... ........... 309 | 39.2 | 60.8 | 13.9 | 13.9 | 11.3) 17.2 | 15.5 | 13.9 | 14.2 
ee fe = 7 
The highland tracts8—1200m | 40 80.0 20.0 57.5 12.5/10.0/ 15.0, 5.0) »| » 
— — — 3— 800 - 48.2 20.1 | 20.5 11.2|17.4|15.2|12.9| 2.7 
The whole of Iceland ...... 375 | 40.3 | 59.7 | 14.6 13.6 | 12.0 | 15.2 | 14.1 | 14.1 | 16.3 
bo 
Ra 
ps 
o 
— 
© 
183.3 | 16.7 60.8 11.8 10.8) 14.7 20)» ane 
162.2 | 37.8) 27.1 | 24.0/ 11.1) 19.1| 10.2| 7.1| 14 
(152 152 12.1 | 17.2 | 16.1 | 13.7 | 10.4 
| 
The highland tracts 8—1200 m | 102 
— — — 3— 800 - | 638 
The whole of Iceland ...... 1503 | 42.5 | 57.5 
species, partly of the number of points 1) for the whole of Iceland, 
which means, practically, for the lowlands of Iceland, 2) for the 
highland tracts between the 300 and 800 m curves, and, finally, 
3) for the highland tracts between the 800 and 1200 m curves. It 
appears from the table with all desirable plainness that the A group 
is best adapted to Icelandic conditions, considerably better than the 
E group. This is evident both from the values computed from the 
species figures and those computed from the points, but it is espe- 
cially evident on comparison between the percentages within the 
same altitude group. 
If, next, we consider the subgroups, the table shows a gradual 
adaptation to arctic conditions. E 2 and especially E 1 show the 
poorest adaptation, not even the lowlands seem to offer favourable 
conditions for the species of these two groups. E 3 thrives well here, 
