404. Rev. W. A. Leighton on new British Lichens. 
Lecidea Caradscensis, Leight. Thallus cartilagimous, dull 
grey-greenish olive, rimoso-areolate, granulato-verrucose ; scales 
convex, crimped or wrinkled; apothecia dull black, sessile on 
the areole, more or less imbedded; sporidia elliptico-fusiform, 
3-septate, hyaline. 
Lecidea Caradocensis, Leight. Lich. Brit. Exs. 160! (1854); Nylander, 
Prodr. Lichen. p. 137 (1857); Enum. Lich. p. 126 (1858). 
Discovered by me in 1854, in great abundance, growing with 
Lecidea ostreata, Hoffm., on oak palings surrounding the south 
and west bases of Caer Caradoc, Shropshire. Aymestry!, Here- 
fordshire (1864), Rev. J. F. Crouch. North side of Gopsall 
Wood !, near Twycross, Leicestershire (1864), Rev. A. Bloxam. 
Thallus cartilaginous, moderately thick, forming often large, 
diffused, ir regular patches, of a pale grey-greenish olive-colour, 
rimoso- aol consisting of minute, adnate, roundish, convex, 
smooth scales, rounded or more or less minutely crenulate at the 
margins, densely crowded and aggregated closely together, so 
as to present a crimped or wrinkled granulato-verrucose appear- 
ance, generally smooth, but, when rubbed, becoming somewhat 
pulverulent. Apothecia sessile on the areole, often appearing 
more or less deeply imbedded, by reason of the thalline scales 
forming a prominent crimped ‘border around them, very small, 
numerous, single, or more frequently crowded, confluent, and 
difformed. Disk flattish, of a dull brownish black colon! 
Margin thin, irregular, and very flexuose, slightly prominent, 
and more or less incurved, of the same colour as the disk. 
Paraphyses closely conglutinated into a brown mass. Hypothe- 
cium dark brown. Ascii inconspicuous. Sporidia minute, ellip- 
tico-fusiform, 3-septate, hyaline, the number not ascertained. 
Puate IX. fig. 6. Vertical section of apothecium and thallus. 
fig. 7. Sporidia, magnified 1200 times hnear. 
fig. 10. L. Caradocensis, natural size. 
Lecidea Friesii, Ach. Thallus cartilaginous, brownish olive, 
diffuse, glebuloso-squamulose ; scales convexo-gibbous, smooth 
and polished ; apothecia black, prominently sessile on the scales ; 
sporidia ellipsoid, simple, hyaline. 
Lecidea Friesii, Ach. in Liljebl. Sv. Fl. p. 610 (1816); Nyl. Scand. p. 243 
(1861). 
myrmecind, Fr. in Vet. Ak. Handl. p. 257: (1822) ; Lich. Eur. p- 344 
(1831); S. V.S. p. 114 (1846); Exs. 28; Nyl. Prodr. p. 136 (1857); 
Enum. p . 126 (1858). 
Psora Cannes. Mudd (non Leight.), Mudd, Man. p. 169, t. 3. f. 61 
(excl. syn.) (1861); Exs. 142! 
On old oak-trees and stumps. Farndale! Stogdale! Kaldale ! 
Baysdale! (in the latter locality mixed with Lecidea ostreata, 
Hoffm.) ; all in Cleveland, Yorkshire; Mr. W. Mudd. 
