144 Proceedings of Philosophical Societies, [Aug. 



General Hardwicke, FLS. ; also, a Description of a New Genus, 

 belonging: to the Natural Family of Plants, called Scrophu- 

 larinec ; by Mr. David Don, Librarian LS. ; and, a Review of 

 the Genus Combretum ; by Mr. George Don, A.LS. 



April 4. — The following papers were read : 



On Dichotomous and Quinary Arrangements in Natural His 

 tory, by Henry Thomas Colebrooke, Esq. FR!S. FLS. &c. 

 Th6 learned author states that what has been called the dicho- 

 tomous arrangement of nature can only be represented on a su- 

 - perficies : whereas, the affinities of natural objects ramify in 

 every direction, and cannot therefore be correctly represented 

 on B. plane surface. He then shows that that distribution which, 

 taking one central or interior group, makes only a few equi- 

 distant exterior ones, is necessarily quinary. The centre of the 

 exterior groups will represent the solid angles of a tetrahedron 

 within a sphere of which the centre is the middle point in the 

 interior group. He finally observes, that although the tendency 

 to a qumary arrangement in natural history has hitherto been 

 chiefly developed in zoology, yet the same principle may be 

 recognised in botany. 



On Boswellia, and certain Indian Terebinthacea ; by the same 

 author. 



April 18. — The reading of Mr. Colebrooke's paper On Bos- 

 ivellia, S^c, was concluded ; and a paper was read, entitled. 

 Observations on a Species of Simla, Linn, now alive in the col- 

 lection at Exeter Change, allied to, if not identical with, the 

 Simia Lagothrica of Baron Humboldt ; by Edward Griffiths, 

 Esq. FLS. 



Alai/ 2. — A paper was read. On the Locusts, (Gry//w.s migra- 

 torius, Linn.) which devastated the Crimea, and the southern 

 provinces of Russia, in 1824 ; by J. Smirnove, Esq. FLS. Secre- 

 tary to the Russian Embassy. 



Also, a paper On Indian Annonaceee. ; by H. T. Colebrooke, 

 Esq. FRS. LS. &c. 



May 24. — On this day, being the birth-day of Linnaeus, the 

 Anniversary Meeting of the Society was held, when the follow- 

 ing Fellows were chosen Officers and Council for the ensuing 

 year. 



Pm?We;i^— Sir James Edward Smith, MD. FRS. Sec. 



Vice Presidents. — Samuel, Lord Bishop of Carlisle, LLD. 

 VPRS. FAS. ; A. B. Lambert, Esq. FRS. AS. and HS. ; W. G. 

 Maton, MD. FRS. and AS.; and Edward Lord Stanley, MP. 

 FHS. 



Treasurer. — Edward Forster, Esq. FRS. and HS. 



Secretary. — James E. Bicheno, Esq. FGS. 



Assistant Secretary. — Richard Taylor, Esq. FSA. Mem. Asiat. 

 Soc. 



CoMwa/.— Charles Bell, Esq. FRSE.; John Bostock, MD, 



