264 NOTES ON LICHENS 



Lecidea concentrica, Dar. 



calcivora, Ehrh. Perhaps the most unplantlike of 



plants, resembling a piece of stone punctured by pin points, 

 parmeliarum, Smrf. " Abrothallus Smithii." 



Opegrapha herpetica, Ach. 



vulgata, Ach. 



varia, Pers. 



var. pulicaris. Lightf. 



lyncea, 8m, 



saxicola, Ach. 



Qraphis serpentina, Ach. 



divaricata, Leight. 



sophistica, Nyl. 



Stigmatidium crassum, Dub. 



Hutchinsise, Leight. 



Arthonia vinosa, Leight. 



epipasta, Ach. 



astroidea, Ach. 



" punctella." Numerous specimens occur thus 



named by Mr Hardy, most of which are spermogo- 

 niferous forms, without apotheeia, and none can be 

 referred to A. punctella, Nyl. 



Yerrucaria nigrescens, Pers. 

 — mauroides, Schcer. 



maura, Whlnb. 



Isevata, Ach. One of the few lichens that live 



under water, frequently on pebbles in running streams. 



epidermidis var. cinereo-pruinosa, Schoer. 



immersa. Somewhat resembles Lecidea calcivora, 



but with 1 -septate spores. 



biformis, Bower. 



punctiformis, Ach. 



chlorotica, Ach. 



gemmata, Ach. 



umbrina, Whlnb. 



"microstoma," is hymenogonia, Nyl. 



plumbea, Ach. 



erratica, Mass. "Microthelia pygmoea." 



" ventosicola." Merely black spermogones of 



Lecanora ventosa. 



