CAITHNESS LICHENS I47 



large number of specimens and has furnished me with 

 interesting notes and sketches and dimensions of spores of 

 a considerable number of rare or critical species. 



LicJiina pygmcBa Ag. (Fresgoe, Reay). 



„ confinis Ag. (frequent). 

 Collenia fiaccidiivi Ach. 



„ tenax Ach. (frequent). 

 „ nigrescens Ach. 

 Leptogiiiiii lacertnn Gray. 



„ scotinum Fr. , var. si7iiiatnm Malbr. 



SphceropJiorus coralloides Pers. 



» fragilis Ach. 



BcBomyces rufus DC. 



„ aeruginosiis DC. (frequent). 

 Stereocaiilon paschale Fr. , teste Bouly de Lesdain. 



„ dejiudatuDi Fl. 



Pycnothelia papillaria Duf. (rare). 

 Cladonia firma Nyl. 



„ pyxidata Fr. 



„ „ var. neglecta Fl'k. 



„ „ var. graciUvna, teste B. de Lesdain. 



„ „ var. costata^ teste B. de Lesdain. 



„ fimbj'iata Fr. 



„ ,, f. subulata. 



„ „ f. dendroides. 



„ „ var. tubceforinis Fr. 



„ fibula Nyl. 



„ gracilis Hoffm. 



„ cornuta Fr. 



„ sobolifera Nyl, 



„ degenerans Fl. 



„ „ f. pleolepidea Nyl. (Morven). 



„ furcata Hoff. 



„ „ var. spinosa Hook. 



., racemosa Nyl. 



,, ,, f. recurva Fl. 



,, „ xzx.fissa^ teste Bouly de Lesdain. 



„ pjingens Fl. 



,, crispata Nyl. 



