138 Nature protected 
of those trees, may be preserved. Thus 
a permanent object of education and 
study to the neighbouring university 
is secured. The most important species 
of lichens which occur there are : — 
Arthopyrenia antecellens, A, cinereo- 
pruinosa, Acrocordia tersa, Sagedia 
olivacea, Pyremila laevigata, Calicium 
adspersum, C, lenticulare, Sphinctrina 
tubaeformisy S. turbinata, Arthonia 
fuliginosay A. gregaria, A. impolita, 
A, marmorata, A, medusula, A, ob- 
scuray A. pineti, A, stellaris, Ope- 
grapha Tumeric Graphis elegans, G, 
serpentina, G, dendritica forma acuta, G. 
conglobata^ G. stellaris, Enterographa 
crassa, Lecanactis abietina, L, illece- 
brosa, L, lyncea, Pertusaria leptospora, 
P. multiptmcta, P. pustulata, Tkelo- 
trema lepadinum, Gyalecta Flotowii, 
Phialopsis rubra, Biatora diluta, B. 
Lightfootii, B. quernea, Bacidia albes- 
cens, B, carneola, B. Friesiana, Bilim' 
