106 
Simmons , Eemarks about tlie Kelations of the Floras etc. 
related to that of Spitzbergen as Jönsson thinks, on the con- 
trary we must agree with Rosenvinge that it is very closely 
allied to that of the Western coast. 
But here a new questioh arises: is the flora of east Green- 
land uniform all along the coast? To get an answer to this 
question I have noted how far soutlrwards on the coast those 
species grow, wliich are not found on the west side. None of 
them reaclies to tlie soutli of 65 °, for several the Southern limit, 
as far as known at present, lies to the north of the 70 th 
parallel. On the other liand several rnore or less common 
West-Greenland-algae do not from Cape Earewell reach further 
up on tlie east coast than to the 66 th parallel or there about. 
I have here only taken into consideration such species as are, 
witliin tlie arctic regions, only found in Greenland, as these 
seem most fit to tlirow light upon the problem about the 
uniformity of the east-coast-flora. At least 10 such species 
are only found in Southern East Greenland, viz. : 
Edocarpus pycnocarpus 
— siliculosus 
Coilodesme bulligera 
Physematoplea attenuata 
Alaria Pylaii 
Ayarum Turneri 
Laminaris longicruris 
— groenlandica 
Delesseria spinulosa 
Bhodochorton mcmbranaceum d) 
If a compai’ison is made by means of the previous method, 
we lind: 
Southern 
East-Greenl. 
Number of species 10 
Per et. of total number 12 
Common 
63 
74 
Northern 
East -Ctreenl. 
12 
14 
Total 
85 
Through taking into consideration also the distribution within 
the Greenland-area of more widely spread algae, the percentage 
of Southern species would be still more augmented at the cost of 
the species common to the whole coast, but I think the difference 
between the northern and Southern flora will appear as clearly, if 
only the distribution of the Laminariaceae is considered. The 
distinctly american species Laminaria longicruris 2 ) and Agarum 
Turneri do not reach above 66° and about the same latitude 
also the endende Lam. groenlandica , and Alaria Pylaii , arctic 
only in Greenland, have their limit. On the other hand 
Laminaria saccharina (var.) and L. Agardhii (dubious) have their 
Southern limit, the former at 69°, the latter at 74° (?). Un- 
questionably this remarkable mode of distribution must someliow 
stand in connection with the former landbridge between Iceland 
and Greenland , that has reached the Greenland coast between 
the 65 th and 69 th parallel, as is still pointed out by the sub- 
marine ridge in the Denmark Strait, That two species, Alaria 
J ) Also found at Jan Mayen. 
9 As it is only found at one point and not (y.et?) fartber south, too 
great importance must not be attached to it. 
