| this altitude. | 
380 BOTANY OF THE AZORES. 
nalis, H. rupestris, Nostoc cwruleum, Raphidia viridis? 
Sorospora montana.* 
In order to afford some idea of the altitudinal range of the 
Algæ enumerated here, I add a list of such of them as have 
been observed at Aberdeen, near the sea level, Bulbochete 
setigera, Conferva ericetorum, Draparnaldia glomerata, Has- 
sallia ocellata, Hematococcus binalis, Lyngbya Zonata, Nostoc 
commune, N. ceruleum, Raphidia viridis, Tetraspora lubrica, 
Tolypothrix distorta. 
The Hill of Fare, a nearly isolated range of small extent, 
not much exceeding 1000 feet at its highest point, com- 
mences about fourteen miles west from Aberdeen, and 
extends four or five miles nearly east and west. I have 
observed in its streams, Lemania fluviatilis, Trentepohlia pul- 
chella, Draparnaldia tenuis, Lyngbya Zonata, Batrachosper- 
mum moniliforme, B. vagum,t and on wet rocks and in 
marshes on the higher parts of the hill at 600 to 800 
feet, Stigonema atrovirens, S. mamillosum, and Scytonema 
myochrous. gs 
It is scarcely necessary to remark that the Desmidieæ —— 
appear to have in general a greater altitudinal range than ce 
most of those Alge enumerated here; it is, however, Pro — 
bable that future observations may add considerably to the z 
number of species of the other tribes, growing at high alti- = 
tudes. we 
_ Supplementary Notes on the BorANY oF THE ÁZORES; 
ME Warsow; Esa. : uM Dd E o 
it 3 By their geographical position, if not by their eo o 
relations also, the Azorie Isles become invested with 
* Pisidium nitidum and Colymbetes arcticus ? were seen in marshes at 
+ B vagum was observed some years ago in Loch Phadrich, near à 
Castleton of Braemar, at about 2000 feet, = 7 
