NUMERICAL REPRESENTATION OF PLANT DISTRIBUTION 411 
11 Tyne. 66 67 68 
12 Lakes, Man. 69 70 71 Lake Lance. Westmd. 
13 West. Lowlds. 72 738 74 75 76. 77 
14 East Lowlds. 78 79 80 81 82 88 84 
15 East Highlds. 85 86 87 88 89 90 91 
Ditto. 92 98 94 95 96 Nairn. Inv. 
16 West Highlds. 97 98 99 100 101 102 103 104 
17 North Highlds. 105 106 107 108 109 
18 North Isles. 110.3435 3a5 
In America many forms of symbols have been adopted to 
show aquatic distribution in lakes, &c., but I am not aware that 
figures have 
In Holland the distribution of their Carices was shown on little 
maps, many on 
For the twenty- nine botanical sig of hice the distri- 
bution of the species has been shown by irregular squares, the first 
two letters of each division indicating where the cee ‘occurred, 
dots where it was absen 
ee 
Ob. 
Om Kp. 
| Ab. Ho cs goes 
I do not see that much is gained by putting the she in the 
form of the country, as Mr. Praeger suggests. I to me 
that Mr. Watson’s plan is simpler, and can be added to “2 9 deietvea's 
but I would suggest that the figures be one ink 
bringing more clearly to the eye the object 
The Finland enumeration is accompanied: oy a capital he 
ne a key to the other; on opening these and turning to the 
t abulae representations, the distribution can be grasped at once. 
Of course, all these methods are simply introductions to the far 
— question of mapping from the ecological standpoint. The 
s of parts of Scotland by the late Robert Smith, and later ones 
of Yorkshire by his brother, contain a vast amount of work and 
information. As long ago as 1891 Mr. E. A. Wainio published 
* Herb. Mus. Fennici Pl. Vascul. (1889). 
