LICHENS 
pilation the record is for the eastern Lake Ontario 
district already referred to. It is scarcely necessary 
to remark that as lichens are extremely sensitive to 
smoke and most gases it is necessary to go outside 
the city limits and beyond the influence of furnace 
smoke and factory fumes to find them. 
Family GRraPpHIDACEAE. 
Graphis scripta var. limitata Schaer. Trees. Very 
common. 
Arthonia astroidea Ach. On trees. Common. 
i lecideella Nyl. Trees. 
- spectabilis Flot. On trees. 
Family GyaLECTACEAE. 
Conotrema urceolatum (Ach.) Tuckerm. Poplar. 
Family LecrEacnaz. 
RiAiors atropurpurea (Schaer.) Mass. Beech. 
berengeriana Th. Fr. On earth. 
“  eyrtella (Ach. Nyl.) Tuckerm. Trees. 
hypnophila (Turn.) Tuckerm. Bases of 
trees. 
laureri (Hepp.) Tuckerm. On beech at 
St. Catharines and Niagara Falls. 
“rubella (Ehrh.) Rabenh. Trees. 
sanguineo-atra (Fr.) Tuckerm. Moss at 
bases of trees. 
suffusa Fr. On trees throughout Ontario. 
181 
“ 
“ce 
