214 Linnean Society. [March 15, 



in all structures, in the nervous and tegumentary, equally as in the 

 glandular and muscular. These facts, the author observes, may 

 perhaps assist us to understand the nature of the injection of the 

 tracheae by M. Blanchard, and also the mode of nutrition in insects ; 

 the ultimate branches of tracheae in the tissues of the alimentary 

 canal operating, possibly, as absorbent structures, and inducing the 

 chylific fluid elaborated around them to flow, in its transit outwards, 

 along the channels formed by their loose peritoneal covering into the 

 regular circulatory currents. Further, they may assist to explain 

 the mode of coloration of the tracheae in the experiments of MM. 

 Alessandrini and Bassi, and of M. Blanchard, and also in others, yet 

 unpublished, made by himself on the larvae of Clissocampa Neustria, 

 in July 1837. 



March 1. 



R. Brown, Esq., President, in the Chair. 



The Meeting having been specially summoned for the Election of 

 a Member of Council in the place of James Francis Stephens, Esq., 

 deceased, Thomas Bell, Esq., was declared to be elected in his room. 



Read the commencement of a paper entitled " Notes on the Vege- 

 tation of Buenos Ayres and the neighbouring Districts." By Charles 

 James Fox Bunbury, Esq., F.R.S, F.L.S., &c. 



March 15. 



R. Brown, Esq., President, in the Chair. 



John Van Voorst, Esq., was elected a Fellow. 



Read a continuation of Mr. Bunbury's paper " On the Vegetation 

 of Buenos Ayres," &c. 



