IO Botanical Report. 
Speaking roughly, therefore, about one half of the district is 
Chalk, of the other half about one fourth is London clay, and 
the remaining one fourth is made up of sands, clays, and 
gravels. 
The Sub-Committee have been thus particular as to the 
reasons which induced them to select this particular district, 
because, some little time after they had chosen it, they learnt 
that the South London Microscopical and Natural History Club 
had adopted one which seems to be almost identical with it, 
and it appears from the map, with Mr. Jackson’s description 
annexed, which was laid before the Club at the meeting on 
Oct. 16th, that the district which they have selected is exactly 
the same as our own, except towards the south. We make 
our southern boundary, as we have seen, the northern edge of 
the Gault, whilst their boundary is the northern edge of the 
Upper Greensand. As the Upper Greensand seems to go 
naturally with the chalk, whilst the gault, on the other hand, 
differs much from both these strata, there seems no sufficient 
reason for excluding the Upper Greensand. 
The Sub-Committee first heard that the South London Club 
had selected this district in this way. Directly after they were 
appointed they made overtures for help and co-operation to 
some of the members of the various Natural History Clubs 
which had been established in the neighbourhood of Croydon, 
and amongst others, to some of the members of the South 
London Club. They, however, expressed themselves as 
unable to co-operate with us, as they were themselves working 
the same district. It is not, of course, intended to question 
the right of the South London or any other Club to work any 
district which in their opinion is the most convenient and 
most desirable for them, but the Sub-Committee cannot but 
feel that the result which both Clubs desire would have been 
better attained if the South London Club had communicated 
with us before they selected for themselves a district which lies 
so immediately around our town, and made arrangements for an 
independent investigation of it. 
With regard to that part of the district which lies in the 
county of Kent, the Sub-Committee have thought it better not 
to deal with that in this report. A Flora of Kent is now being 
prepared by Mr. F. J. Hanbury, and when that is completed it 
will probably prove a complete and exhaustive Flora of the 
county. In addition to this the Sub-Committee feel that the 
Surrey part of the district will require all the time which they 
can bestow upon it, and therefore, that, for the present, at all 
events, it will be better to confine their work to our own 
county. 
Having thus settled the area of ground to be worked the 
