586 



independent of external influences, when the stipule was simply al- 

 lowed to lie on the field of the microscope without any pressure or 

 injury whatever. This movement continued for at least twenty 

 minutes during one of the experiments, and I have no doubt might 

 have been observed much longer. It is of importance to distinguish 

 between those molecular movements which are caused by injury and 

 pressure, and those which depend on processes going on in the in- 

 terior of the living plant. My experiments are by no means com- 

 plete, but they lead at present to the adoption of Schultz's opinion 

 relative to the existence of cyclosis." 



C. 



BOTANICAL SOCIETY OF LONDON. 



Friday, June 1, 1849. — George Cooper, Esq., in the chair. 



The following donations were announced : — 



A parcel of specimens from the Azores ; presented by Thomas Ca- 

 rew Hunt, Esq., Her Majesty's Consul at St. Michael's. 



Foreign plants from M. Sagot. 



Robert Holland, Esq., of Cirencester ; W. M'Ewen, Esq., of Arun- 

 del ; and T. G. P. Smith, Esq., of Liverpool, were elected members. 



The continuation of Dr. Ayre's paper ' On the Botany of Thame, 

 Oxfordshire,' was read. — G. E. D. 



DUNDEE NATURALISTS ASSOCIATION. 



Tuesday, June 5, 1849. — The President in the chair. 



A paper was read by Mr. W. M. Ogilvie, F.B.S., being a botanical 

 visit to the Den of Balthayock, Perthshire. Amongst the plants ob- 

 served, were Lychnis viscaria, Paris quadrifolia, Cystopteris fragilis, 

 and Ceterach officinarum. Mr. Ogilvie remarked that he had also 

 found the Ceterach about five miles further east, in the Den of 

 Pitroddie, where it had been pointed out to himself and Mr. Lawson 

 by Mr. David Gorrie, of Errol. Anomodon viticulosum, Hypnum 

 complanatum, striatum, velutinum, populeum, curvatum, triquetrum, 

 alopecururn, and ruscifolium, Pterogonum gracile, Weissia curvi- 

 rostra, Trichostomum canescens $. ericoides, Bryum crudum and 

 ligulatum, Orthotrichum coarctatum, Zygodon Mougeotii, Fissidens 



