126 
The Scottish Naturalist. 
sooner some attempt is made to do it the better. It might be ex- 
pedient to have a conference of both English and Scottish 
naturahsts (botanists as well as zoologists) to discuss the matter of 
natural faunistic areas. A third objection is that a special map is 
required for the natural districts, whilst any map will show the 
county boundaries. But in these days of cheap map production 
this objection is not of much importance. On the other hand, 
what definition of the county boundaries is to be taken ? The old 
or the new ? The old boundaries are shown in our present maps, 
but what about the alterations in several counties made by the 
Boundaries' Commissioners of the Local Government Act ? If 
these alterations are given effect to in future maps,^ the records of 
counties will in some cases be misleading. (To give an example. 
I lately found a station " — not hitherto recorded — for Helix 
virgata, beside the River Forth, and just on the boundary be- 
tween Perthshire and Clackmannanshire. Now, if that snail had 
been included in the ^'Census" of vouchers, it might have ap- 
peared in the West Perth — or, as Mr. Roebuck calls it, South 
Perth — column. But the Boundary Commissioners have handed 
over this outlying bit of Perthshire to some other county, and I 
suppose that in future maps it will cease to appear as part of 
Perthshire.) 
In conclusion, I notice that Mr. Roebuck is in doubt as to which 
vice-county some of the specimens sent from " near Perth," be- 
long. Moreover, if my memory is not at fault, some of the Perth- 
shire localities are placed in the wrong vice-county. It seems a 
pity, therefore, that on these points local information was not 
asked for. Several Perthshire collectors of Mollusca would, I am 
sure, have been pleased to have helped to make the " Census " 
more perfect, while an examination of the extensive collection of 
the local Land and Fresh-water Mollusca in the Perthshire 
Natural History Museum would, I think, have been of service to 
the census-takers. 
1 Just after writing this I noticed the advertisenient of a map " showing the 
new county boundaries.'" 
