402 ALDERNEY. 
L. protrusa, Fr. Cliffs at Clanque. Near Fort Essex (Larba- 
lestier). 
L. coarctata, Sm. Slopes of Fort Tourgis. 
L. caligans, Nyl. On a single block of stone near Fort 
Essex (Larbalestier). My specimen (Larbal. Zich. Rariss., No. 119) 
is labelled ‘L. caligans, Nyl. nov. spec. (c. fr.) Alderney, 1873. 
Only three or four specimens found.’ 
L. rivulosa, Ach. Frequent on the cliffs. 
L. contigua, Fr. Rather common on rocks and stones. 
L. canescens, Dicks. One of the commonest lichens in 
Alderney. Occasionally in fruit. 
L. stellulata, Tayl. Cliffs near La Chue. Walls on the 
L. myriocarpa, DC Cliffs at Clanque. 
L. subdisciformis, Leight. Near Val du Sud, and at Clanque. 
L. biformigera, Leight. Coast of Alderney (Larbalestier). 
L. albo-atra, Hffm. Roadside wall near Trois Vaux. 
L. aromatica, Sm. Frequent on old walls. 
L. phacodes, Korb. On an Elm-tree in Reuters Valley 
(f. chlorotica, Ach.). 
L. sabuletorum, Flk. Old wall below Essex Castle. Wall 
near White Gates. 
L. endoleuca, Nyl. Essex House Valley, on trees. Chaise & 
?Emauve, on furze stems, 
L. rubella, Ehrh. On an Elm, Essex House Valley. 
L. geographica, L. Frequent on the coast. 
L. petraea, Wulf. Rather common on rocks and stones. 
L. concentrica, Day. Ona wall near Trois Vaux. 
Opegrapha atra, Pers. On trees, common. 
O. saxicola, Ach. Common on walls and boulders. 
