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



Ramalinei. 

 Ramalina pollinaria, Acharius. 



Eamalina pollinaria, Acharius, Lick Univ., p. 608; A. Rich., Sertum Astrolab., p. 51 ; NyL, Synop. 

 Lich., i. p. 29G. 



Ascension. Lesson. 



Europe ; Asia ; Africa ; West Indies ; South America ; St Helena. 



This is included on the authority of Richard. 



Ramalina polymorpha, Acharius. 



Ramalina polymorpha, Acharius, Lich. Univ., p. 600, Synop. Lich., p. 295 ; NyL, Synop. Lich., 



i. p. 293. 

 Ramalina implicata (errore pro emplecta, Acharius?) A. Rich., Sertum Astrolab., p. 51. 



Ascension. Lesson. 



Widely dispersed. 



Usneei. 

 Usnea trichodea, Acharius. 



Usnea trichodea, Acharius, Meth. Lich., p. 312, t. 8, fig. 1 ; Nyl., Synop. Lich., i. p. 270; A. Rich., 

 Sertum Astrolab., p. 50. 



Ascension. Lesson, 



Nova Scotia ; Cuba ; Cape of Good Hope ; Bourbon ; New Zealand ; Java. 



Parmeliei. 

 Parmelia conoplea, Acharius. 



Parmelia conoplea, Acharius, Synop. Lich., p. 213, ex A. Rich., Sertum Astrolab., p. 51. 



Ascension. Lesson. 



Parmelia saxatilis, Acharius. 



Parmdia saxatilis, Acharius, Synop. Lich., p. 203; Nyl., Synop. Lich., i. jp. 388; A. Rich., Sertum 

 Astrolab., p. 51. 



Ascension. Lesson. 



Generally diffused. 



Physciei. 

 Physcia leucomela, Michx. 



/ 'hi/scia leucomela, Michx., Fl. Bor.-Am., ii. p. 326; Nyl., Synop. Lich., i. p. 415, var. angustifolia ; 



Mey. et Flot. in Nov. Act. Nat. Cur., xix., Suppl., i. p. 221 ; Crombie in Journ. Linn. Soc. Loud., 



xx. p. 83. 

 Borrera leucomela, Acharius, Lich. Univ., p. 499. 



Ascension. — On the ground, amongst rocks — Moseley. 

 Widely spread. 



