942, THE JOURNAL OF BOTANY 
Cohn. This I believe to be the highest temperature at which 
filamentous alge have been collecte 
iat rrom Hor Sprines in IcELAN 
Some months a r. A. W. Hill, of the Bc Laboratory, 
Cambridge, most kindly S eedeets me a number of tubes of alge 
which he collected in hot springs in Iceland in 1900. Some of them 
were from Hveravellir, almost in the centre of the island; others were 
from the mountain range Kerlingarféll, and one was from the hot 
m ‘ 
ai and amongst the most abundant was Masti igocladus laminosus 
Cohn, an alga which is widely distributed in hot springs all over the 
) i e } 
quantity, and other alge of note were Oscillatoria proboscidea 
Gomont, O. numidica Seay and Calothria parietina Thuret, 
var. pe malis. Four species of Desmids were 0 served, three of 
which indicate the dando of distinctly northern types to life in 
hot water 
The first mention of alge from hot springs in Iceland was by 
Sir William Hooker, who visited many of the hot springs in 1809, 
and found several species of ‘‘Conferva” in them; later, Berkley 
found species of H chris in collections made by Baring-Gould 
in the spray and overflow of the spring Tun guhver. Lauder 
Lindsay (1861)* ae found two kinds of ‘ Conforva” in some very 
hot springs at Laugarn 
Only a few tacugas ‘and one alga belonging to the Cone 
ule found in Mr. Hill’s Icelandic material; but in the streams 
uing from the hot springs Cy New Zealand, Dr. 8. Bergarent 
Quite recently, Bérgesen, in a paper ited ‘‘ Nogle Fersk- 
vandsalger a Island,’’§ has published an account of some alge 
from Iceland, all of which are Hee gh ea Of the Spon a 
Cniomnnees. 
Hormiscia subtilis (Kiitz.) De Toni. Cras gl, 48-52 P 
Kerlin Temperature not definitely known (between 30° and 
* Bot. Zeitung, 1861, p. 359. 
+ S. Berggren in Nordstedt’s ry h nd Austral” 
Kony). geese a tc < Alg. of New Zeal. a 
t West, “Freshw. Alg. from ae indie Journ. Linn. Soc. (Bot-) ***- 1894. 
§ Borgesen in Bot. Tidsskrift, Bd. 22, 1898. 
