LLVNEERTS LICTTEXS 111 



Placodium iryracenm Anzi var. 'pyritliromum A. L. Sm. An 

 athalline form on a foreign white thallus, the apothecia in small 

 groups, amongst decaying mosses al)ove 8000 ft. on Snowdon. — 

 P.ft'rrugineum Hejip. Very sparingly on a tree near the Castle. 



CandelarieUa vitellina Miill.-Arg. Frequent around Lhmberis. 



I*hyscia jyiilverulentn Nyl. Somewhat rare on trees in Llanberis 

 Pass. — *P. steUaris N}^. var. cercidia Nyl. Observed once near 

 Nant Perris. — P. liispida Tuckerm. Frequent, the f, leptulea 

 (Ach.) on trees, and f. tenella (Scop.) on rocks near Lljm Padarn. 



*Rinodina demissa Arn. On slate near lAyn Padarn. 



Lecanora gelida Acli. Rocks in Llanl:>eris Pass and above tlie 

 tarn in Cwm Grlas Mawr. — L. suhfusca Ach. var. *ch1arona Ach. 

 Trees near Llanberis. Var. aJIopliana Ach. Trees near the Castle. — 

 L. rugosa Nyl. Apparentl}' rare, seen once on trees near Llanberis. 

 — L. atra Ach. Frequent, and ascending to 3500 ft. on Snowdon. — 

 *L. Hageni Ach. On small stones in Llanberis Pass. — *L. car- 

 pinea Wain. On branches of trees, frequent. — *L. varia Ach. 

 Sparingly on old worked wood near Llanberis. — *L.farinmHa Borr. 

 var. conizcBoides A. L. Sm. On larch near Llanberis. — L. sidpJiurea 

 Ach. Kocks and walls in Llanberis Pass and below Cwm Glas. — 

 *L. epanora Ach. Noticed in several places in Cwm Glas, and on 

 the ascent of Snowdon from Llanberis. — L. polyiropa Schser. Seen 

 very sparingly on Snowdon. — L. hadia Ach. Frequent on boulders, 

 Llanbei-is Pass, Snowdon, and below Clogwjm. — *L. atriseda Njd. 

 Wall in Llanberis Pass, with Lecidea geograpMca. — L. tartarea 

 Ach. Frequent, and fruiting well on tree-trunks and rocks ; the 

 Ya,r. frigid a Ach. on Snowdon above Cwm Glas Mawr. — L. parella 

 Ach. Occasional on walls and rocks. — L. lacustris Th. Fr. Abun- 

 dant on stones below Llanberis Waterfall, and at intervals in the bed 

 of the stream doAvn to tlie lake. — L. Dicksonii Nyl. Frequent, 

 ascending from near the Ll^^n Padarn to tlie summit of Snowdon. 



Acarospora fuscata Th. Fr. Rocks in Cwm Glas. — *A. smarag-' 

 did a Massal. Rocks below Clogwjm. 



Pert i( sarin glohidifera Njd. Rare, on trees near Llanberis. — 

 JP.faginea Leight. Rather frequent on trees. — *P. midtipuncia 

 Nyl. Trees near the base of Snowdon, rare. — *P. lacfea Njd. Fre- 

 quent, but always sterile, ascending to the summit of Snowdon. — 

 P. communis Dalla Torre and Sarnth. Only noticed once on a tree 

 near Llanberis. — P. dealhata Cromb. Boulders in Llanberis Pass. 

 Frequent on Snowdon and Clogwyn. — P. leioplaca Schaer. Trees 

 near Nant Perris. 



Crocgnia lanuginosa Hue. Shady mossy wall in Llanberis Pass. 



*Racodium rupesire Pers. Rocks in Cwm Glas. 



GgropJiora polgphgUa Hook. f. congregata T. & B. Rocks 

 below Clogwyn, and near the foot of Crib Goch. — G. cgJindrica 

 Ach. Near the summit of Snowdon and on rocks below Clogwyn. 

 forma denudafa Mudd and var. fimlriafa Ach. Clogwyn. *Var. 

 denticidata Ach. Rocks above Cwm Glas near the summit of 

 Snowdon. — *G. torrefacta Cromb. Observed ver}^ sparingly below 

 Clogwyn. 



Bceomyces roseus Pers. Seen in a sterile condition only on 

 Snowdon. — B. riifus DC. Itocks in Llanberis Pass. 



