she found the patellulae of all ages constantly black. It may
be added that their substance is not so thick, and their
margin, especially when young, narrower and less rounded.
In dried specimens the thallus bears a general resemblance
to that of Lecanora Jhrinaria (the subject of our next plate),
but when recent it is of a greener hue. The plant nearly
answers to the character given in the Acharian Synopsis,
p. 27, to Lecidea tenagea, which Fries, in his Lichenogra-
phia Europcsa Reformata, p. 263, regards as a state of his
Biatora vernalis, the Lichen vernalis of Engl. Bot. t. 845, and
Lecidea luteola of Acharius.— W. B.
