Simmons, Hemarks about the Relations of tlie Floras etc. 
159 
North atlantic 
coast of 
America 
Northwestern 
Europe 
Fa er o es and 
Iceland 
Northern 
Norway 
t g 
c3 <2 
3 s 
c* 
U> y 
cs rh 
0 
! 
H 
® <D 
OL o 
u 3 
a> .d 
N & 
s*= U 
Siberian 
Polar Sea 
r* Cj 
<3 ® 
O Jd 
|| 
Northern 
Pacific 
Petrocelis polygyna (Kjellm.) Schmitz 
g 
X 
Cruoria arctica Schmitz 
X 
X 
g 
Cruoriellci Dubyi (Crouan) Schmitz 
X 
X 
X 
X 
X 
Peysonellia Rosenvingii Schmitz 
X 
X 
X 
g 
1 tliododermis elegans Crouan 
X 
X 
X 
g 
Clathromorphum compactum (Kjellm.) 
Fosl. 
X 
X 
X 
X 
se 
X 
circumscriptum (Strömf.) Fosl. 
X 
X 
X 
X 
g 
X 
Lithothamnion arcticum (Kjellm.) Fosl. 
X 
Lenormandi (Arescli.) Fosl. 
X 
X 
X 
e 
laeve (Strömf.) Fosl. 
X 
X 
X 
X 
X 
g 
investiens Fosl. 
X 
g 
thopläforme Unger 
X 
X 
X 
X 
foecundum Kjellm. 
X. 
X 
X 
X 
X 
varians Fosl. 
X 
g 
colliculosum Fosl. 
X 
X 
X 
X 
X 
s 
fiabellatum Rosenv. 
X 
X 
X 
X 
g 
botrytoides Fosl. 
X 
fruticulosum (Kütz.) Fosl. 
X 
X 
X 
X 
X 
glaciale Kjellm. 
X 
X 
X 
X 
gse 
? 
X 
flavescens Kjellm. 
X 
X 
se 
Corallina officinalis L. 
X 
X 
X 
X 
e 
X 
Hildenbrandtia rosea Kütz. 
X 
X 
X 
X 
X 
gse 
X 
Tlie number of species liere counted as arctic, PhaeopJiyceae 
84, Rhodophyceae 75, togetber 159, gives a relation between t-lie 
numbers of tlie groups, tbat is more in accordance witb tlie fact 
tbat tbe former increase, tlie latter diminisli nortbwards. Tlie 
above nnmbers give 53 brown and 47 red algae in a bundred, 
wbile tlie numbers of Kjellman give resp. 49 and 51 for tlie 
arctic regions. In bTortbern ISTorway tlie percentage is 41 to 59, 
in Iceland 47 to 53, in tbe Faeroes 45 to 55 and in Scotland 
42 to 58 (Simmons, 38, p. 227 and 228). Fartber soutbwards 
tbe relative number of PJiaeophyceae becomes still smaller. 
