IVernei'ian Natural History Sociefif, 281 



this genus after Mr.W. Jackson Hookerj of Norwich, F.L.S., 

 a young naturalist of great promise, the discoverer of Biix- 

 lanrnia ap/u/lla, and author of a work on tiie Jungerinanniae, 

 which is about to appear. 



April 19. The chair was filled this evening by the Presi- 

 dent, who read a communication oi' his own, on A iie\ir 

 Genus of .Liliaceous Plants, which he has called Brodcea, 

 in honour of Mr. Brodie j whose numerous and valuable 

 illustrations of the botany of Scotland give him a juil 

 claim to tliis distinction. This pa})er contained some ad- 

 mirable remarks upon the difficulty which some plants, and 

 especially the Lihacese, present, of distinguishing between 

 the calyx and corolla, and upon the doctrine of Jussieu on 

 this subject. Dr. Smith conjectures that both these organs 

 may be united where one of them seems to be wanted 5 the 

 external surface performing the functions of the calyx, 

 and the internal those of the corolla. 



Some interesting letters from Peter Collinson to Linnaeus 

 were also read by the President, which, he stated, were in- 

 tended for some future publication. One of them related a 

 remarkable instance of hybrid fruit on an apple-tree, pro- 

 duced by the proximity of a tree bearing another kind. The 

 President mentioned a similar fact which had come under 

 his own observation near Norwich. A peach- and nectarine- 

 tree grew close together, and bore sometin^es peaches, some- 

 times nectarines, and sometimes a fruit partly resembling 

 each. 



WERxMERIAN NATURAL HISTORY SOCIETY. 



At the last meeting of the Wernerian Natural History 

 Society, Professor Jan)eson read an account of a method of 

 constructing and colouring mineralogical maps. We can- 

 not give a satisfactory account of this paper withoivt draw- 

 ings ; we shall therefore only observe, that maps executed ac- 

 cording to this plan show distinctly the figure of the clrffs, 

 terraces, acclivities and summits of single mountains, and 

 also the characters of mountain-ranges and mountain- 

 groups : and the colouring affords a true and harmonious 

 representation of the alternation, extent, and relative position 

 of the dififerent rocks that appear al the surface. Profcss^or 



Jameson 



