THE LICHEN FAMILY. 515 



Cetraria glauca. M. 



E. B. xxiii. 1606 (as Lichen glaucus). 

 Peltidea canina. H., among moss and grass, common. A large, 

 brownish-grey lichen, easily known by its great shield-shaped 

 apothecia, resembling finger-nails, and the white and prettily- 

 netted under surface, from which descend a kind of rootlets. 

 E. B. xxxii. 2299 (as Lichen caninus). 



nifescens. H. 



E. B. xxxii. 2300 (as Lichen rufescens). 



Umbilicaria {Gfyrophora, Sm.) pohjphylla. M. E,. 



E. B. xviii. 1282 (as Lichen polyphyllus). 



erosa. M. R. Distinguished by the curious lace-work of 



its circumference. 



E. B. xxix. 2G6C (as Gyrophora erosa). 



Sticta pulmonaria. T. Principally upon oaks, clothing them with a 

 curiously pitted and reticulated green vesture. 

 E. B. viii. 572 (as Lichen pulmonarius) . 



Parmelia aleurites. T. Also on rails, posts, &c., chiefly in moun- 

 tainous districts. 



E. B. xii. 858 (as Lichen aleurites). 



perlata. Similar localities. 



E. B. V. 341 (as Lichen perlatus). 



caperata. Similar localities. 



E. B. X. 654 (as Lichen caperatus). 



pulverulenta. (Fig. 228.) T. W. 



E. B. xxix. 2063 (as Lichen pulverulentus). 



stellaris. T. W. 



E. B. xxiv. 1C97 (as Lichen stellaris, but coloured green instead of 

 silver-gray). 



ceratophylla {physoJes, Sm.) T. W. Conspicuous from its 



whiteness, and elegantly divided and curled figure. Apothecia 



very rare. 



E. B. ii. 126 (as Lichen phyiodes). 



saxatilis. M. R. T. W, 



E. B. ix. 003 (as Lichen saxatilis). 



omphalodes. M. M. R. 



E. B. ix. C04 (as Lichen omphalodes). 



conspersa, M. M. R. 



E. B. XXX. 2097 (as Lichen conspersus). 



oUvacea. T., W., park palings, &c. 



E. B. xxxi. 2180 (as Lichen olivacens). 



35 a 



