112 THE VOYAGE OF H.M.S. CHALLENGER. 



Parmelia caperata, Acharius. 



Parmdia caperata, Acharius; Nyl., Synop. Lick, i. p. 376 ; Leighton in Melliss's St Hel. p. 376. 



St Helena. Melliss. 

 Widely spread. 



Parmelia conspersa ; Acharius, forma mougeotii. 



Parmelia conspersa, Acharius ; Nyl., Synop. Lich., i. p. 391 et 392 ; Leighton in Melliss's St Hel., p. 

 376 (forma mougeotii). 



St Helena. Melliss. 



Very widely diffused. Nylander regards this form as a distinct species. 



Parmelia incurva, Fries ? 



Parmelia incurva, Fries?; NyL, Synop. Lich., i. p. 394 ; Leighton in Melliss's St Hel., p. 376. 



St Helena. Melliss. 

 Europe ; North America. 



Parmelia hyperopta, Acharius \ 



Parmelia hyperopta, Acharius? ; Leighton in Melliss's St Hel., p. 376. 



St Helena. Melliss. 



Parmelia hyperopta. Acharius, is reduced to Parmelia ambigua by Fries (Lich. Europ., 

 p. 71), which Nylander now refers to the genus Squamaria. 



Parmelia lepidiota, Smrf. 



Parmelia lepidiota, Smrf. ; Leighton in Melliss's St Hel., p. 376. 



St Helena. Melliss. 



Physciei. 

 Physcia flavicans, DC. 



Physcia flavicans, DC. ; NyL, Synop. Lich., i. p. 406; Leighton in Trans. Linn. Soc. Lond., xxvii. p. 

 156, et in Melliss's St Hel., p. 376. 



St Helena. Burchell ; Melliss. 

 Widely dispersed. 



Physcia leucomela, Michx., forma angustifolia. 



Physcia leucomela, Michx. ; Nyl., Synop. Lich., i. p. 414 ; Leighton in Trans. Linn. Soc. Lond., xxvii. 

 p. 156, et in Melliss's St Hel., p. 376 (forma angusti folia). 



St Helena. Burchell; Melliss. 

 Widely spread. 



