THE REV. W. A. LEIGHTON ON NEW BRITISH LICHENS. 239 
LECIDEA ENDOMEL&NA, Leight. Pale cirereo-virescent, opake, glebulose; glebule scat- 
tered or areolato-diffract, thick, convex, composed of minute conglomerate convez, 
roundish, or sublobate subfurfuraceous squamules. (K pale yellow, C pale yellow.) 
Apothecia violet-black, rather large, innato-sessile, at first plane with a thickish 
margin, afterwards very convex and immarginate, slightly pruinose, concolorous 
within; hypothecium very thick, nigro-fuscous, with a paler brown enclosed inter- 
mediate stratum ; spores 8, colourless, small, elongato-ellipsoid, simple. 
On stone walls, very rare, 1874. 
A very distinct species. Hymenium palish blue, I dense violet. Paraphyses cohzerent, 
apices fuscous. Spores 0115—0125 mm. long, '0045-'005 mm. broad. 
ODONTOTREMA MAJUS, Leight. Whitish or evanescent; apothecia brownish, prominent, 
: scattered, rotundate, suburceolate ; margin thickish, prominent, persistent, nearly 
entire; hypothecium colourless or slightly fulvescent; paraphyses distinct, slender ; 
spores 8, colourless, broadly lineari-oblong, 3-septate. 
On drift wood and decorticated stumps, rare, 1876. ; 
I renders the linear азс} and spores lutescent. Spores double the size of those of 
О. minus, Nyl., 019—021 mm. long, "0075-0085 mm. broad. Spermogonia brownish, 
oblong, minute; spermatia oblong or lineari-oblong, “0095 mm. long, "008 mm. broad. 
This I possess amongst the Arctic American lichens of Sir John Richardson ; and now 
(Sept. 1876) it has occurred on drift wood іп Goodwick Bay, Pembrokeshire. It has also 
been detected on old willow stumps at Hencote Pool, near Shrewsbury, and on wood 
chips in Gloucestershire. 
Spores of О. minus, Nyl. (see fig. 15), 0115-014 mm. long, 005mm. broad. Spores 
of О. longius, Nyl. (see fig. 17), ‘0195-021 mm. long, -005--007 mm. broad. 
VERRUCARIA NEOTTIZANS, Leight. Apothecia black, minute, clustered, hemispherico- 
conical; peritheciwm carbonaceous, entire; paraphyses distinct, slender ; spores 4, 
Suscous, lineari-oblong, 3-septate, constricted. 
Parasitic on the thallus of Beomyces rufus, DC., very rare, 1876. 
Gelatina hymenea I—. Spores “0245-025 mm. long, ‘0085-009 mm. broad. 
Llanachar bridge! near Fishguard, Pembrokeshire (Sept. 1876). қ 
VERRUCARIA FUMOSARIA, Leight. -Apothecia black, minute, hemispherico-depressed, 
semi-immersed ; epithecium poriform ; perithecium dimidiate, much incurved at the 
base ; paraphyses none; spores 8, fuscous, broadly or rotundo-oblong, 1-septate. 
Parasitic on the thallus of Lecidea Suscoatra, f. fumosa, Ach., rare, 1876. 
Spores -0155—016 mm. long, “007 mm. broad. 
Pen Cow! near Fishguard, Pembrokshire (Sept. 1876). 
E. ҮлььтсавтА PERTENUIS, Leight. Cinereo-nigricant, thin, filmy, continuous, opake, 
Surfuraceous ; apothecia black, opake, minute, numerous, hemispherical, sessile ; 
2M 2 
