times a paler sometimes a browner zone, and sometimes,
not always, with a narrow line of black. The internal substance
is whitish, with a very narrow stratum of green near
the surface. Scutellae numerous, not larger than poppyseed,
bursting from the apex of the granulations, to which
they give, in their infant state, a resemblance to the papil-
lulae of the genus Isidium, and which .they surpass considerably
in diameter when fully expanded, so that they have
then a salver-like figure. Margin circular, entire, obtuse
but narrow, slightly elevated when young, at length depressed.
Disk soon becoming convex, of a very dark dull
brawn or almost black, pale reddish brown within ; occasionally
falling out and leaving a cup-like hollow.
An extremely remarkable Lichen, a link, apparently, between
the genera Lecanora and Isidium, approaching very
closely to the latter in the structure of the thallus.—W.B.
LECANORA spodophaea.
Close branchy-crusted Lecanora.
CRYPTOGAMIA Lichenes.
Gen. Char. Scutellce sessile, with a margin of the
same substance as the thallus.
Spec. Char. Crust tartareous, areolate, formed of
concrete branch-like granulations, gray ; greenish
when wet. Scutellae small, terminating the
granulations; margin slightly crenulate, at length
depressed; disk reddish brown.
Syn. Lecanora spodophaea. Ach. Lich. Univ. 385.
Syn. 155.
Parmelia spodophaea. Ach. Meth. Suppl. 37.
Lichen spodophaeus. Wahl. FI. Lapp. 409. FI.
Suec. 805.
F o r the addition of this curious Lichen also to the British
list we are indebted to Mr. Robertson, who found it
growing with L . aipospila on the coast of Northumberland.
Wahlenberg originally discovered both species on the coasts
of Norway ; nor do they appear to have been collected in
any other country, unless the Lichen defraudans of Olafsen,
found by him in Iceland, be, as Acharius suspected, the same
as L . spodophcea.
The crust of this species, which is said to spread widely,
is composed of granulations which may be seen in some cases
to be cylindrical and branch-like ; but they are so intimately
connected and, mostly, confluent, that it is rarely possible to
discover their individual shape. The mass they form appears
nearly level and continuous to the naked eye ; but a
lens shows it to be divided by narrow cracks into small