LTNNEAN SOCIETY OF LONDON. XXV 



Mr. Bull stated that he liad grown Shorea in this country from 

 seeds sent to him covered with wax. 



The following papers were then read, viz. : — 



1. " Contributions to the Botany of H.M.S. ' Challenger ' Ex- 

 pedition." Communicated by Dr. Hooker, V.P.L.S. Nos. III. 

 toXIY. 



No. III. " Notes on Freshwater Algae collected in the Boiling 

 Springs at Euruas, St. Michael's, Azores, and their neighbour- 

 hood." By H. N. Moseley, Esq. 



In the valley of Fvu'nas are two distinct sets of hot springs — one 

 at the village, and the other at a distance of two or three miles, on 

 the shore of the lake. lu the priucipal one of the springs at the 

 latter locality ebullition is constantly going on, and no Algge were 

 found in it. At a short distance is another spring of sulphurous 

 intensely hot, but not boiling, water ; and the water is here co- 

 vered to the depth of almost 1| inch by a shining substance com- 

 posed entirely of OscillatoricB mixed with a Botryococcus and a few 

 skeletons of Diatomacese, including a species of Navicula. Close 

 by these sulphurous springs are shallow pools of hot water edged 

 round with a Botryococcus. At the other set is a sulphurous spring 

 of boiling-hot muddy water. Immediately below is a swamp of 

 hot mud, also full oi Botryococcus unmixed with Oseillatorice. The 

 exact temperature of the hot springs was not taken. The Algse 

 appear to resemble those described by Eabenhorst as growing in 

 warm springs iu Europe. In a warm stream of about 95° E. a 

 Conferva was found growing amongst the fibres of a moss. 



The neighbouring lake of Eurnas contains several patches 

 from which sulphurous gas is discharged, and is rich in various 

 Algse, such as Nostoc, Oscillatoria, Hydrodictyon, &c. 



No. IV. " Note on the foregoing communication." By Pro- 

 fessor Thiselton Dyer, E.L.S. 



The Diatoms sent home by IVIr. Moseley were submitted to the 

 Eev. E. O'Meara, who found them to belong to species of tl'e 

 most frequent occurrence in fresh water, apparently in no way 

 affected by the high temperature of the water. 



