xl INTEODUCTION 



it is expedient that it should be something conspicuous — a railway, 

 road, or river — in order that it may be easily found in the field ; 

 an imaginary line, such as a straight line between two places, 

 though it looks well on a map, is often difficult to trace in the field. 



Equalization of areas. — It is also desirable that, so far as 

 possible, the country should be divided into portions of approxi- 

 mately equal area ; but here again, the less the arrangement by 

 counties is disturbed the better. 



Utilization of past or future botanical worh. — It is desirable that 

 the scheme as regards subdivision of counties should harmonize 

 with the subdivisions used, or to be used, in pubHshed or future 

 county or local Floras ; since this will save a large amount of 

 labour, when it comes to working out the flora of any county. 



The points of difference between the present scheme and that 

 suggested by Babington, and the considerations which led to their 

 adoption, I have discussed in the paper already referred to, and in 

 the present place it will suffice to give a list of the divisions 

 employed, and to define their bormdaries, when these differ from 

 the easily found boundaries of the counties. 



Numbers astd Nasies of the County- divisions. 



1 Kerry South. 



21 Dublin. 



2 Kerry Kortli. 



22 Meath. 



3 Cork West. 



23 Westmeath. 



4 Cork Mid. 



24 Longford. 



5 Cork East. 



25 Roscommon. 



6 Waterford. 



26 Mayo East. 



7 Tipperary South. 



27 Mayo West. 



8 Limerick. 



28 Sligo. 



9 Clare. 



29 Leitrim. 



10 Tipperary jSTorth. 



80 Cavan. 



11 Kilkenny. 



31 Louth. 



12 Wexford. 



32 Monaghan. 



13 Carlow. 



33 Fermanagh. 



14 Queen's County. 



34 Donegal East. 



15 Galway South-east. 



35 Donegal West, 



16 Galway West. 



36 Tyrone. 



17 Galway North-east. 



37 Armagh. 



18 King's County. 



38 Down. 



19 Kildare. 



39 Antrim. 



20 Wicklow. 



40 Londonderry. 



