1898—1902. No. 21.] LICHENS. 53 
Fruticulose Foliaceous Crustaceous Total 
species species species 
Arctic Area... 61 91 343 495 
Germany & Tirol 54 or 88.5%) 76 or 83.5 fo 254 or 74%) 384 or 77.6 9/5 
Germany .... 51 67 213 331 or 66.8 - 
Title wa a es 52 or 85.2°/) 71 or 78%) 235 or 68.4°/) 358 or 72.3 - 
(of which not in 
Germany... 3 9 Al 53) 
We see therefore that the fruticulose lichens to the amount of 88.5 °/o 
of those recorded for the arctic area occur in Germany and the Tirol, 
83.5 °/) of the foliaceous and 74°/) of the crustaceous lichens. But most 
remarkable to my mind is the figure 72.3 which represents the percent- 
age of Arctic lichens found in the Tirol. With infinite care this area 
has recently been worked through by ARNotp more completely prob- 
ably than any other area in the world as far as lichens are concerned. It 
is interesting therefore and of no little importance to find that nearly 
3/:ths of the arctic lichens are recorded from the Tirol. Of the fruticu- 
lose species 85.2 °/o, of the foliaceous species 78 °/) and of the crustaceous 
species 68.4 °/) of the arctic lichens are found in the Tirol. ARnotp re- 
cords 1137 species for the Tirol. 
There is not as ‘a rule very much doubt as to the naming of the 
fruliculose or foliose lichens, but before the distribution of the crusta- 
ceous lichens can be considered a more settled matter, it will be neces- 
sary to work through some of the genera, like Lecidea, Lecanora, 
Verrucaria, Aspicilia and Polyblastia monographically. A carefull 
monograph — developemental, anatomical and even histological — of a 
genus like Lecidea would be of the greatest interest botanically and 
geographically. But it would be essential that specimens from all over 
the world were examined. 
