556 First Excursion of the 



but S = p -f t + A,* 



therefore S = P. Q. E. D. 



This is the same conclusion as that at which I arrived in 

 my former communications, nor, if Erxleben's work had been 

 at hand when I wrote them, should I have arrived at any 

 other. Having therefore, as I trust, vindicated myself from 

 the charge of a fallacious memory, and from the far greater 

 one of a want of courtesy to Mr. Ogilby, I once more bid 

 adieu to the subject. 



P.S. If zoologists decide upon retaining the chimpanzee as 

 a distinct genus, the generic term Troglodytes must be can- 

 celled, having been long appropriated to a genus of birds. — 

 Perhaps, therefore, the best way of making peace between 

 contending parties will be to retain the term Pithecus, Geoff, 

 for the orangs proper, and to bestow the term Simla on the 

 chimpanzee, calling it Simla troglodytes. 



Cracombe, Evesham, 



Sept. 10th, 1838. 



Art. VIII. — Details of the First Excursion made this Summer by 

 the Members of the Botanical Society of London : with Observa- 

 tions on varieties of Plants. By Daniel Cooper, Esq., A.L.S., 

 Curator to the Society, f 



The first excursion made by the members of this Society was 

 to a spot situated about twenty-five miles from London, call- 

 ed Woking. This spot was chosen on account of the easy 

 access by the London and Southampton railway. Upon 

 alighting at the station at Woking Common, and proceeding 

 to the right of the carriage-road leading to Guildford, on to 

 the common, great abundance of JJlex nanus, Car ex GEderi, 

 Alra caryophyllea and Air a pr<ecox were observed. One of 

 the party discovered a single specimen of Teesdalla nudi- 



* I make no scruple in leaving m (Macacus inuus) out of this equation, 

 because it does not even agree with Erxleben's definition, " cauda nulla, " 

 as it possesses a small caudal tubercle, besides having the general structure 

 of Macacus. Therefore we must suppose that Erxleben classed it as a Si- 

 mla, either through imperfect knowledge of the animal, or from having no 

 better genus provided for it, — an arrangement which could not be defend- 

 ed at the present day. The mere removal of this species cannot therefore 

 affect the integrity of the rest of Erxleben's genus Simla, as the true equi- 

 valent to Pithecus, Ogilb. 



fRead before the Society August the 3rd, 1838. 



