516 THE LICHEN FAMILY. 



Parmelia parietina. Everywhere on stems of bushes, especially old 

 thorns in hedges, covering them with a yellow crust. Also in 

 circular and irregular patches on walls. It is most brilliant 

 when exposed to the sunshine, becoming, under the influence of 

 shade, more lax and leafy, and greener. 



E. B. iii. 194 (as Lichen parietinus). 

 Lecanora murorum [squamaria, Sm.) W. 



E. B. XXX. 2157 (as Lichen murorum). 



air a. W., T., and tombs in churchyards. 



E. B. siv. 949 (as Lichen ater). 



suhfusca. T. W. 



E. B. XXX. 2109 (as Lichen subfuscus). 



pallescens. T. "W. 



E. B. xi. 727 (as Lichen Perellus). 



tartarea. M. R., M., on branches of heath. 



E. B. iii. 150 (as Lichen tartareus). 



varia. T., also on old posts and palings. 



E. B. xxiv. 1066 (as Lichen varius). 



albella. T. (smooth-barked.) 



E. B. XXX. 2154 (as Lichen albellus). 



Hmnatomma. W. Thallus gray ; apothecia blood-red. 



E. B. vii. 480 (as Lichen Ucematomma). 



ventosa. M. R. 



E. B. xiii. 900 (as Lichen ventosus). 



Urceolaria scruposa. On rocks, stones, towers, old tombs in church- 

 yards, &c., incrusting them with a hard, thick, gray crustaceous 



thallus. 



E. B. iv. 260 (as Lichen scruposus). 



Placodiwn canescens. T., especially hawthorn, and occasionally upon 

 rocks, very common. Apothecia very rare. 

 E. B. ix. 582 (as Lichen canescens). 

 Lecidea geographica. M.R. Known by its extremely thin, greenish- 

 yellow thallus, hardly separable from the rock, and confluent, 

 so as to appear divided into compartments by black lines, and 

 resemble the tracings on a map. 



E. B. iv. 245 (as Lichen geographicus). 



(Eden. W. 



E. B. xvi. 1117 (as Liclun QSderi). 



confluens. W. 



E. B. xxviii. 1904 (as Lichen confluens). 



