288 GUERNSE Y. 
Pannaria plumbea, Lightf. 
Guernsey (Salwey). Mr. Larbalestier says this species is ‘very 
rare in the Channel Islands.’ 
Pannaria nigra, Huds. 
On old wall tops. Les Fauxquets and Les Camps, Catel. 
Pannaria psotina, Ach. 
On a wall in the Vale Road. Crombie notes this species from 
the Vale, Guernsey. 
Amphiloma lanuginosum, Ach. 
In several places between Fermain Bay and St. Martin’s Point, 
on shaded mossy rocks. 
Squamaria crassa, Huds. 
Guernsey (Salwey). 
Squamaria cartilaginea, West. 
Guernsey (Mrs. Collings). 
Squamaria saxicola, Poll. 
Plentiful on the eastern side of the Vale Castle. 
V.—PLACODEI. 
Placodium murorum, Hffm. 
Frequent on old walls and on rocks. 
Placodium lobulata, Smrft. 
Rather common on the shore of the lowiands. 
Placodium miniatum, Hffm. 
Fort Doyle Richmond. f. obliteratum, Pers. Divette Cove. 
Placodium callopismum, Ach. 
On a ruined brick wall near the rifle-butts at Houmet, scarce. 
Var. plicatum, Wedd. Vale Castle (Crombie). 
Placodium citrinum, Ach. 
Frequent throughout the island on old walls and posts, and on 
the earth at the base of hedgebanks. (f. depauperata, Cromb., 
occurs in Alderney.) 
Placodium fulgens, Sw. 
Grandes Rocques (Larbalestier). North side of Guernsey ; Miss 
Lukis (Leighton). I have found this species in Alderney. 
Placodium candicans, Dicks. 
Guernsey (Mrs. Collings). 
