456 X. GENERAL REMARKS. 



Middle and North Britain united ; East or West England 

 against Scotland. The statistical comparisons being there 

 made between the numbers of the sub-iorovinces, it was 

 desirable to adopt such a line of separation as would 

 place them in two groups equal in numbers. And it will 

 be recollected that the desired equalitj-^ was obtained by 

 combining those of Middle and North Britain, with the 

 exception of Lincolnshire being added to South Britain ; 

 and so making the numbers into 19 south and 19 north. 

 Including this slight change in the sub-provinces, it aj)- 

 pears by the blanks in the first column of the census, that 

 the number of species peculiar to the two divisions run 

 thus : — 



South Britain, 209. North and Mid Britain, 139. 

 And next, by deducting these numbers from the whole 

 flora of Britain, we find the numerical values of the two 

 several floras thus : — 



South Britain, 1286. North and Mid Britain, 1216. 

 On making like comparisons between England and Scot- 

 land, founded on the ' areas of species ' and on the third 

 column of figures in the census, the number of species 

 peculiar to one or other sub-kingdom appear thus : — 



England, 410. Scotland, 74 or 75. 

 And the numerical values of their total floras, — ascer- 

 tained in each instance by deducting the absent species 

 from the whole flora of Britain, — according to the same 

 list, appear to be thus : — 



England, 1350. Scotland, 1015. 

 It has previously been explained, page 450, that the 

 number of species so attributed to Scotland may i^erhaps 

 be deemed too low by those botanists who are more soli- 

 citous to extend floral lists numerically, than to eliminate 

 from them the distrusted natives. The like explanation 

 might also be applied in some degree to the line of 



