Simmons, Remarks about the Relations of tlie Floras etc. 
159 
North atlantic 
coast of 
America 
- 
ä 
if 
* 2 
tö 
o 
Faeroes and 
Iceland 
s js 
o 
1 § 
I o 'rt 
o $ 
||S 
1 c 
Spitzbergen 
province 
Siberian 
Polar Sea 
American 
Polar Sea 
Northern 
Pacific 
Petrocelis polygyna (Kjellm.) Schmitz 
& 
X 
Cruoria arctica Schmitz 
X 
X 
s 
Cruoriella Dubyi (Crouan) Schmitz 
X 
X 
X 
X 
X 
Peysonellia Rosenvingii Schmitz 
X 
X 
X 
& 
Phododermis elegans Crouan 
X 
X 
X 
ö 
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 (Aresch.) Fosl. 
X 
X 
X 
e 
laeue (Strömf.) Fosl. 
X 
X 
X 
X 
X 
& 
investiens Fosl. 
X 
g 
thophiforme Unger 
X 
X 
X 
X 
foecundum Kjellm. 
X 
X 
X 
X 
X 
varians Fosl. 
X 
er 
ö 
colliculosum Fosl. 
X 
X 
X 
X 
X 
s 
flabellatum Rosenv. 
X 
X 
X 
X 
O' 
ö 
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 
The number of species here counted as arctic, Phaeophyceae 
84, Phodophyceae 75, together 159, gives a relation between tlie 
numbers of the groups, that is more in accordance with the fact 
that the former increase, the latter diminish northwards. The 
above numbers give 53 brown and 47 red algae in a hundred, 
while the numbers of Kjellman give resp. 49 and 51 for the 
arctic regions. In Northern Norway the percentage is 41 to 59, 
in Iceland 47 to 53, in the Faeroes 45 to 55 and in Scotland 
42 to 58 (Simmons, 38, p. 227 and 228). Farther southwards 
the- relative number of Phaeophyceae becomes still smaller. 
