very grey, or, when wet, a glaucous green, rather deepest
in the powdery parts : in drying it becomes almost white.
The underside is closely attached by extremely fine pale
woolly fibres. When any portion remains free it is of a
buff hue, and appears, when magnified, of a rather loose
texture and almost downy. The tubercles cause each a
little protuberance on the underside of the leaf, and the
apex at length breaks through the upper surface, forming a
regular slightly prominent speck, just visible to the naked
eye, and pierced with a central pore. The nucleus is brown
with a carneous tinge, and has a small cavity in the centre
when dry. Under a powerful glass it appears composed of
a mixture of innumerable linear and globular pellucid cor-
puscules.
This curious little production is so unlike to every other
Lichen, that its very genus must have remained doubtful
but for Miss Hutchins’s fortunate discovery of the tubercles.
Acharius, to whom Sussex specimens were communicated,
thought It a Thelephora, thus excluding it even from the
natural order to which we hold it to belong.—W. B.
2602. (Fig. 2.)
V E R R U C A R I A euploca.
Curled Peltate Verrucaria.
CR YPTOGAMIA Lichenes.
Gen. Char. Tubercles of a different substance from
the thallus, simple, convex, not expanding, but
furnished with a central pore, and inclosing a
somewhat gelatinous nucleus.
Spec. Char. A coriaceous peltate leaf, deeply lobed,
with jugged curled recurved edges, naked on
both sides; olive-green above; tawny beneath.
Tubercles immersed, nearly globular, pale except
the slightly prominent apex.
Syn. Lichen euplocus. Ach. Prod. 141.
Endocarpon euplocum. Ach. Meth. 127. t. 3. f . 4.
Lich. Univ. 301. Syn. 102.
E. miniatum (3. pusillum. Wahl. FI. Lapp. 462.
W e owe the knowledge of this as a British species to
Mr. W. Robertson, a very accurate investigator of the
Lichens. He discovered it by the Tyne, a little to the
West of Newcastle, “ growing scattered, not in patches,”
on sandstones exposed to the tide.
The general outline of the plant is orbicular. The largest
specimens, which are scarcely half an inch in diameter, aie
sometimes polyphyllous; the smaller ones are simple, but
mostly cut, often almost to the centre, into several irregular
undulated and imbricated lobes, with edges again jagged,
or crenate, and recurved. The upper surface is of a dull
greyish copper-brown in dried specimens : Mr. Robertson
observes that it has whilst recent a brighter olive-green
than it subsequently assumes when moistened, but that the
bright tawny colour of the underside scarcely changes,
merely becoming a little paler in long-kept specimens.
The deep, laciniated lobes, and the colour of the under