17 
Some Al gæ from hot Springs in Spitzbergen. 
By Kaare Münster Ström. 
The following list of species is determined from 
material collected by Adolf Hoel Esqr. during his ex- 
peditions to Spitzbergen the summers 1912 and 1919. 
Collections were made from the hot springs Trold- 
kilderne and Jotunkildeme in the vicinity of Bock Bay. 
The springs are situated at a Northern Latitude 
■of 79° 25' 30". and are 13° 28' East of Greenwich. 
The temperature of water in the springs is varying, 
generally from 20 — 25 degrees centigrade, but in some 
of the springs the water measures up to 28,3 C°. This 
relative high temperature explains that of the Algæ 
found there so many are new to Spitzbergen. On the 
whole the flora of the hot springs was very interesting. 
As to further details concerning the springs, con- 
sult: A. Hoel et O. Holtedahl: Les nappes de lave, 
les volcans et les sources thermales dans les 
environs de la baie Wood au Spitsberg. (Yiden- 
skapsselskapets Skrifter. I. Mat.-Naturv. Klasse 
1911. N : o 8). 
There was also a sample from Snadden Bay, 30 
kilometres^ South of Hornsund, collected the summer 
1919. 
The new form of Ohara aspera was very kindly 
determined and described by Professor 0. Nordstedt. 
of Lund, Sweden. 
There was also a moss, Campylium polygonum (Br. 
Eur.) Bryhn var. brevicuspis Lindb., determined by the 
late dr. N. Bryhn. 
Professor Wille has previously published a short 
list of Algæ from the same hot springs, collected in 
1910, in the work of Messrs. Hoel and Holtedahl 
mentioned above. 
I have quoted his list here, so that the present 
Botaniska Kotiser 1921, 2 
