LICHENOLOGICAL MEMORABILIA. 115 



On the yew trees in Llanrocliwyn cliurcliyard were Opegi-apha 

 c.tra,/. nigrita, Leight. ; an Opegrajiha wliicli on more attentiye 

 examination may perhaps prove new. 0. taxicola, Leight. 

 Lecanora sophodes, f. rohoris, (Duf.). 



Around the Conway falls I met with Venmcaria lucens, Tayl., 

 Stigmatidium Ilutchinsice, Leight., VeiTUcai'ia clilorotica, (AcH.), 

 Plutysma ulophylla, (Ach.), Pertusaria multipimctata, (Turn.), 

 Lecanora lacustris, (With.), L.tartu7\'a, f. frigida, Ach, 



In August I passed a couple of days at Bwilth, South Wales, in 

 company with the Caradoc Field Club, and gathered there Verru- 

 caria rupestvis, (Schrad.). V. chlorottca, f. carpinea, Sch^r. V. 

 biformis, Borr. Lecidea excentrica, Ach. L. si/lvicola, Flot. L. 

 turgidida, Fr. L. endoleuca, Nyl. Arthonia astroidea, Ach., on 

 ash and mountain-ash. A. vtnosa, f. pineti^ on holly. Ojyegrapha 

 varia, f. diapliora, Ach., on ash. 0. atra f. nigrita, Leight. 

 Graphis scripta, var. seiycntina, f. tutypa, Ach. Lecidea 

 tricolor, (With.), on holly, with spermogonia ; Calicium 

 juercinwn, Pers., C. hyperelimn, Ach., and C. stemonetim, 

 Ach., on birch. Sphinctrina turbinata, (Pers.), Lecidea alboatra, 

 f. epipolia, Ach., on holly. L. citrinella, Ach., L. turgidula, Fr., 

 L. endoleuca, Nyl., Lecanora expallens, Ach., Opegrapha atra, f. 

 arthonoidea, == Schger. 463 and 634. Opegrapha atra, f. viridis, = 

 Anzi Ital. Sup. 334. Lecidea Jusco-atra, f. Ilosigii, Ach. Bceo- 

 myces rufxis, I).C. 



A week in the month of September was passed at Pwlhelli, 

 North Wales, and on the Gimlet Rock in the bay I detected 

 Licliinaconfinis, Kg., Ruincdina cvapidata, Ach., Verrucariamaura, 

 (Whlnb.), Lecidia protrvsa, Fr., Lecanora prosecha, Ach., 

 Lecidea stelhduta, Tayl., L. coarctata, f. involuta, Tayl., Placo- 

 dium murorvm, Hoffm., f. obliteratum, (Pers.), Placodium callo- 

 pisnivm (Acn.'), f.plicattmi, Wedt>., Lecanora fennigi^iea, (Huds.), 

 /. /estiva, (Ach.), Lecidea Uthopkila, Ach., L. intumescens, Flot.), 

 Pertusaria Westringii, (Ach.), Endocari^on miniatum, (L.), var. 

 complicatum, (Sw.), Verrvcaria nigrescens, Pers., Physcia aquila, 

 (Ach.), in fruit; Lecanora squanmlosa, (Schrad.), Arthonia 

 varians, Da v. ; and on the stems of grass on the sands, but very 

 sparingly, Lecanora pyreniospora, Nyl., Lecidea nigritula, Nyl., 

 and Lecanora varia, (Ehrh.), all growing together. 



One day we crossed to Nevin, on the north shore of the 

 promontory of Lleyn, but were disappointed in not finding any 

 cliffs or rocks on the beach. Verrucaria nigrescens, Pers., covered 

 the stone walls for miles. We also met with Verrucaria chlorotica, 

 (Ach.), var. codonoidea, Leight., Collema limosum, Ach., and 

 Lecidea polycaipa, Flk. 



We now turned our steps to Llanbedrog, a village four miles 

 S.W. from Pwlhelli; and on a rock above the village projecting 

 into the sea, we obtained a goodly harvest of lichens. Urst and 

 foremost was a little Lecidea, growing parasitically on rock, on a 



