92 Rey. T. Salwey ; List of the scarce Lichens found 
resemblance of Cenomyce cespititia. The pilidia however are truly 
those of a Calicium; and the dull brownish green hue of the capitu- 
lum, surrounded, as it frequently is, by the bright yellow ring of the 
sporulés bursting from the edge of the disc, give the plant a very 
distinct and peculiar appearance. It is of very unfrequent occur- 
rence. 
Calicium spherocephalum. Probably common upon the old decaying 
timber of barns, &c., but overlooked from its minuteness, the crust 
appearing to be scarcely more than a stain upon the wood of a bluish 
gray colour, in which the young apothecia before they are fully de- 
veloped appear to the naked eye like immersed black dots. 
C. furfuraceum. Dry banks about Oswestry ; on the bank be- 
tween the pool and the common at the Lodge near Ludlow. 
This is not a plant of general occurrence. The bright pale lemon 
colour of the whole plant readily points it out. It is quite dissimilar 
in habit and place of growth from the rest of the Calicia, and has 
been removed by Dr. Taylor to Beomyces. 
Opegrapha saxatilis. Sandstone rocks, Craigforda. 
O. dendritica. On the smooth bark of trees, but not common. 
Verrucaria gemmifera. Craigforda. 
Lhis plant arrests the eye by presenting the appearance of a ver- 
digris or bluish gray stain upon the rock: the apothecia are very 
minute. 
V. gemmata. Upon the bark of old ash-trees, Pentregaer, &c. 
This is the largest of the Verrucarie, and not uncommon upon the 
bark of old ash-trees, where the size of the apothecia contrasting 
with the white ground of the bark, give it a conspicuous appearance. 
V. rupestris. Common upon the limestone rocks at Oswestry, 
upon the Moelydd, and at Pentregaer. 
V.immersa. In the same habitats as the former and at Craig- 
forda, but less common. The smaller size both of the apothecia and 
of the cavities in which they are immersed, its gray crust as opposed 
to the white one of rupesiris, and a certain peculiar neatness in the 
appearance of the whole plant, distinguish it from the former. 
V. levata... Upon stones in the Morda Brook under Craigforda. 
V.epipolea. Limestone rocks on the Moelydd and at Pentregaer. 
This is a very handsome and conspicuous species; the crust is 
often suffused with a pale rose-colour, which, contrasting with the 
bluish colour of the apothecia, gives this plant a.very beautiful ap- 
pearance. 
V.acrotella. Craig-y-Rhu : scarce. 
V. epigea. Hay Coppice, Herefordshire. Perhaps not uncommon 
in.a barren state, when it may be overlooked as a young state of 
some Conferva or Vaucheria. 
V. Hookeri.. Mynydd-y-Myfyr : very scarce. 
Endocarpon miniatum. Limestone rocks, Oswestry ; Wickliff rocks, 
Ludlow, and Downton Castle. 
E.. Hedwigti. On the top of the wall opposite the house at the 
Moor Park near Ludlow, and other similar situations. 
E. lete-virens. In fruit on Mynydd-y-Myfyr in the parish of 
