398 X. GENERAL JIEMARKS. 



and species for Middle Europe (France, Germany, Switzer- 

 land), for Scandinavia (Denmark, Sweden, Norway, &c.), 

 and for the British Isles (Britain and Ireland) may be 

 stated thus : — 



Middle Europe has 118 orders, 4600 species. 

 Scandinavia 104 „ 1700 „ 



British Isles 102 „ 1500 „• 



The number of orders and species for the British Isles 

 are here somewhat increased, for the purpose of bringing 

 them into more exact comparison with those adojpted in 

 the works consulted for the other two portions of Europe. 

 Otherwise, on the basis of the Cybele, its orders and spe- 

 cies, the union of Ireland would be considered to add 

 scarcely one score of species, and no other order, to the 

 British flora. On the above figures, the average number 

 of species to an order is thus : — 



M, Europe, 38.91. Scandinavia, 16.34. B. Isles, 14.70. 

 It thus still appears that the larger area or larger flora 

 (one or both) has more species in proportion to orders. 

 For the purpose of bringing out this fact still more 

 strongly, another comparison shall be resorted to, be- 

 tween the averages for Britain and for other areas, lax'ger 

 and smaller. The only local Flora for a county of 

 Britain, which admits of ready comparison with the 

 Cybele Britannica, is that for Yorkshire, amended and 

 corrected by Mr. J. G. Baker, through the ' Supplement ' 

 lately published. The county of York exactly corre- 

 sponds with the province of Humber ; and being situate 

 about the middle latitude of Britain, it is a very suitable 

 tract for the comparison here sought to be instituted 

 between successively smaller areas, each one being an 

 included portion of the larger. The numbers before 

 taken from Lindley's ' Vegetable Kingdom ' shall be again 

 taken to represent a flora for the whole Earth ; those 



