16 
The Connemara station for Erica Mackaiana is peculiar ; 
according to my observation it occurs only on a small 
rocky eminence wliicli rises out of a vast bog which is the 
home of E, Tetralix ; as it grows in free flowering bushes a 
foot or more in height, it may readily be picked out from 
plants of E. Tetralix. 
A series of British and Continental specimens of the 
heaths named in this communication now lie on the tables 
for comparison with the living plant. 
