LICHENS OF LLANBEKIS AND DISTRICT 109 



" New Rare or Critical Lichens." Bceomyces rosevs, which Mr. Wel- 

 don only saw in a sterile condition, was observed with abundant 

 apothecia on the side of the path leading from Llanberis to Helfa. 

 Most specimens of Lecidea lapicida 1 examined gave a yellow 

 reaction with potash, and are therefore referable to L. polycarpa Flk. 



The following are additions to Mr. Wheldon's list, and also to 

 those recorded from the district by me in the papei-s already men- 

 tioned. Where no locality is given Llanberis must be understood. 



Thermufis velutina Th. Fr. On damp precipitous rocks from 

 Glyder, overlooking Pass. Only a few apothecia were seen. 



Ephebeia hispidiila Nyl. Cwm-^^-glo. 



Collem.a ceraniscum Nyl. Moist rocks overlooking Pass. Rock 

 ledges, Clogwyn, C. pidposum Ach. Rare, on mortar of house, 

 Hebron. G. cheileum Ach. On walls, Dinorwic. 



Lep)togium scotinum v. sinuatum Malbr. L. lacerum Gray, 

 not common ; var. lopliceum Nyl. Beddgelert ; var. pulvinatitm 

 Krb. On mortar and surrounding rock with Placynthium nigrum 

 Gallopisma rnpestre, C. calvum, and Phi/scia cc^sia. 



Pannaria nehulosa Hoffra. On wall-top. Pass. 



Massalongia carnosa Krb. Frequent, 400 to 2000 ft. 



Feltigera rufescens Hoffm. and P. polydactyla v. hymenina Nyl. 

 are frequent. 



Solorina saccata Ach. In addition to the stations given, this 

 was noticed at Clogwyn, Glyder (3200 ft.), and Beddgelert. 



Stictiua fuliginosa Nyl. and S. limhata Nyl. Cwm-y-glo and 

 Beddgelert. 



Goniocyhe fiirfuracea Ach. 



Sph(srophori(s conipressus Krb. Snowdon, 3000 ft. >S'. coral- 

 loides form conyestus Lamy. Common. 



Ramcdina calicaris Fr., It. farinacea Ach., and H. fasiiqiata 

 Ach. are rather frequent, especially near Cwm-y-glo. R. subfarinacea 

 is occasional. 



Parmelia subconspersa Nyl. On wall near Llanberis Church. 

 P. omphalodes f. ceesiopriiinosa Nyl. 



Usnea florida Web. Llanberis and Baddgelert. 



Alecforia nigricans Nyl. Near summit of Glyder Fawr with 

 Farmelia corniculata, P. pubescens, Gladonia gracilis form amauray 

 G. degenerans f . pleolepidea and G. lepidota f. hypophylla near it. 



I^lacodium murorum DC. On wall. 



Gallopisma citrinum Krb. On mortar and surrounding rock. 

 G. ferrugineum v. festivum Mudd. On hard rock near Llanberis 

 waterfall. 



Lecanora subfusca Nyl., L. intumescens Krb., L. pallida Schaer., 

 and L. conizcea Nyl. are occasional on trees, L. campestris Nyl. is 

 apparently rare. L. intricata Ach. On rock near Hebron. L. gan- 

 galeoides Njd. and L. subtartarea Nyl. On rock, Snowdon, 2500 ft. 

 L. umbrina Mass. 



Hcdmatomma ventosum Mass. Snowdon. 



Pertusaria communis f. rupestris DC. P. loulfenii DC, P. 

 dealbata f. corallina Cromb. Snowdon, 2500 ft. 

 Jlrceolaria scruposa Ach. Walls, Nant Peris. 



